|Medical Dictionary - Dictionary of Medicine and Human Biology|
Relating to sensation. [L. sensorius, fr. sensus, sense]
1. Relating to the body and the senses, as distinguished from the intellect or spirit. 2. Denoting bodily or sensory pleasure, not necessarily sexual. [L. sensualis, endowed with feeling]
1. Domination by the emotions. 2. Indulgence in sensory pleasures. [L. sensualis, endowed with feeling, fr. sentio, to feel]
The state or quality of being sensual.
In a broad sense. [L.]
In a strict sense. [L.]
sentient (sen′shent, sen′she-ent)
Capable of, or characterized by, sensation. [L. sentiens, pres. p. of sentio, to feel, perceive]
1. Feeling or emotion in relation to one idea. 2. A complex disposition or organization of a person with reference to a given object (a person, thing, or abstract idea) that makes the object what it is for him or her. [L. sentio, to feel]
Vivisection of an animal that is not anesthetized. [L. sentio, to feel, + sectio, a cutting]
1. The act of keeping apart or dividing, or the state of being held apart. 2. In dentistry, the process of gaining slight spaces between the teeth preparatory to treatment. jaw s. the amount of space between the jaws at any degree of opening. s. of retina SYN: retinal detachment. sternochondral s. s. of the costal cartilage from the sternum, especially of the 2nd to 7th ribs, which are true joints lined with synovial membranes. s. of teeth 1. loss of proximal contact of teeth; 2. in orthodontics, the creation of interproximal spaces for the fitting of an appliance.
1. That which divides or keeps apart two or more substances or prevents them from mingling. 2. In dentistry, an instrument for forcing two teeth apart, so as to gain access to adjacent proximal walls. SYN: segregator. [L. se-paro, pp. -atus, to separate, fr. se, apart, + paro, to prepare]
Trade name for certain polydextrans used in column chromatography.
sepsis, pl .sepses (sep′sis, -sez)
The presence of various pathogenic organisms, or their toxins, in the blood or tissues; septicemia is a common type of s.. [G. s., putrefaction] intestinal s. s. associated with autointoxication of intestinal origin. s. lenta a slowly developing and more or less localized infection. puerperal s. SYN: puerperal fever.
See septi-, septico-, septo-.
Plural of septum. [L.] intra-alveolar s. SYN: interradicular s. of maxilla and mandible, under septum.
Relating to a septum.
Denoting a malarial fever the paroxysms of which recur every seventh day, counting the day of the occurrence as the first day, i.e., with a five-day asymptomatic interval. [L. septem, seven]
A recently described member of the protozoan phylum Microspora found in the intestine of an immunocompromised individual. The species described is S. intestinalis. This organism has been relcassified as Encephalitozoon intestinalis. SEE ALSO: Encephalitozoon intestinalis.
Having a septum; divided into compartments. [L. saeptum, septum]
Operative removal of the whole or a part of a septum, specifically of the nasal septum. [L. saeptum, septum, + G. ektome, excision]
A rarely used term for septicemia.
Seven. [L. septem]
Relating to or caused by sepsis.
Systemic disease caused by the spread of microorganisms and their toxins via the circulating blood; formerly called “blood poisoning.” SEE ALSO: pyemia. SYN: septic fever, septic intoxication. [G. sepsis, putrefaction, + haima, blood] acute fulminating meningococcal s. SYN: Waterhouse-Friderichsen syndrome. anthrax s. SYN: anthracemia. cryptogenic s. a form of s. in which no primary focus of infection can be found. metastasizing s. sepsis, with entry of microorganisms into the bloodstream leading to abscess formation at a distance from the original site of infection. morphine injector's s. bloodstream infection in an individual who injects him or herself with narcotics, usually intravenously, due to bacterial contamination of equipment used. Seen more often with heroin and narcotics other than morphine. plague s. infection with the plague organism, Yersinia pestis, with bloodstream infection. puerperal s. a severe bloodstream infection resulting from an obstetric delivery or procedure. typhoid s. typhoid during the phase when the organism can be cultured from the blood. SYN: typhosepsis.
Relating to, suffering from, or resulting from septicemia.
Sepsis, septic. [G. septikos, putrifying, fr. sepsis, putrefaction]
Pyemia and septicemia occurring together.
Relating to septicopyemia.
septivalent (sep-ti-va′lent, sep-tiv′a-lent)
Having a combining power (valency) of seven.
Septum. [L. saeptum]
Operation to graft squamous epithelium and dermis to replace the mucous membrane of the nasal septum, especially for patients with hereditary hemorrhagic telangiectasia. [septo- + dermo- + G. plastos, formed]
Relating to the margin of a septum, or to both a septum and a margin.
Relating to the nasal septum.
Operation to correct defects or deformities of the nasal septum, often by alteration or partial removal of skeletal structures. [septo- + G. plastos, formed]
Combined operation to repair defects or deformities of the nasal septum and of the external nose. [septo- + G. rhis, nose, + plastos, formed]
Surgical creation of a septal defect. [septo- + G. stoma, mouth] atrial s. establishment of a communication between the two atria of the heart. SYN: atrioseptostomy. balloon s. s. performed by cardiac catheterization with the use an of inflated balloon pulled across the interatrial septum through the foramen ovale; used in cases of transposition of the great vessels and tricuspid atresia.
septulum, pl .septula (sep′tu-lum, -la)
A minute septum. [Mod. L. dim. of septum] s. testis SYN: septula of testis. septula of testis one of the trabeculae of the testis; imperfect septa and fibrous cords radiating toward the surface of the gland from the mediastinum testis. SYN: s. testis, trabecula testis.
septum, gen. septi, pl .septa (sep′tum, -ti, -ta)
1. [TA] A thin wall dividing two cavities or masses of softer tissue. See septal area, transparent s.. 2. In fungi, a wall; usually a cross-wall in a hypha. [L. saeptum, a partition] s. accessorium an additional ridge forming the lower border of the limbus fossae ovalis. alveolar s. SYN: interalveolar s.. anteromedial intermuscular s. [TA] dense fascial triangle extending from the inferior medial border of the adductor magnus muscle to the vastus medialis muscle. Along with the sartorius muscle, this dense fascia forms the roof of the lower half of the adductor canal and, as the femoral vessels pass deep to it, is often mistaken for the adductor hiatus. SYN: s. intermusculare vastoadductorium [TA] , subsartorial fascia, vastoadductor fascia. aortopulmonary s. the spiral s. which, during development, separates the truncus arteriosus into a ventral pulmonary trunk and dorsal aorta. SEE ALSO: bulbar ridge. atrioventricular s. [TA] the small part of the membranous s. of the heart just above the septal cusp of the tricuspid valve that separates the right atrium from the left ventricle. SYN: s. atrioventriculare [TA] . s. atrioventriculare [TA] SYN: atrioventricular s.. Bigelow s. SYN: calcar femorale. bony nasal s. [TA] the bones supporting the bony part of the nasal s.; these are the perpendicular plate of the ethmoid, the vomer, the sphenoidal rostrum, the crest of the nasal bones, the frontal spine, and the median crest formed by the apposition of the maxillary and palatine bones. SYN: s. nasi osseum [TA] . bulbar s. obsolete term for spiral s.. s. bulbi urethrae a fibrous s. in the interior of the bulb of the penis which divides it into two hemispheres. s. canalis musculotubarii SYN: s. of pharyngotympanic (auditory) tube. cartilaginous s. SYN: septal nasal cartilage. s. cervicale intermedium [TA] SYN: intermediate cervical s.. s. clitoridis SYN: s. of corpora cavernosa of clitoris. Cloquet s. SYN: femoral s.. comblike s. SYN: pectiniform s.. s. of corpora cavernosa of clitoris [TA] an incomplete fibrous s. between the corpora cavernosa of the clitoris. SYN: s. corporum cavernosorum clitoridis [TA] , s. clitoridis. s. corporum cavernosorum clitoridis [TA] SYN: s. of corpora cavernosa of clitoris. crural s. SYN: femoral s.. distal spiral s. spiral s.. endovenous s., s. endovenosum a remnant of the primitive separation between veins that fused to form a definitive trunk, such as the trunk leading to the left common iliac and the left renal veins. femoral s. [TA] mass of connective tissue that occupies the femoral canal, effectively closing the canal but permitting the passage of lymphatics draining the lower limb. SYN: s. femorale [TA] , Cloquet s., crural s.. s. femorale [TA] SYN: femoral s.. s. of frontal sinuses [TA] the bony partition between the right and left frontal sinuses; it is often deflected to one side of the middle line. SYN: s. sinuum frontalium [TA] . gingival s. SYN: gingival papilla. s. glandis [TA] SYN: s. of glans penis. s. of glans penis [TA] a fibrous partition extending through the glans penis from the lower surface of the tunica albuginea to the urethra. SYN: s. glandis [TA] . hanging s. the deformity caused by an abnormal width of the septal portion of the alar cartilages. interalveolar s. [TA] 1. the tissue intervening between two adjacent pulmonary alveoli; it consists of a close-meshed capillary network covered on both surfaces by very thin alveolar epithelial cells; 2. one of the bony partitions between the tooth sockets of the mandible and maxilla (septa interalveolare mandibulae et maxillae). SYN: s. interalveolare [TA] , alveolar s., septal bone. s. interalveolare, pl .septa interalveolaria [TA] SYN: interalveolar s.. interatrial s. [TA] the wall between the atria of the heart. SEE ALSO: s. primum, s. secundum. SYN: s. interatriale [TA] . s. interatriale [TA] SYN: interatrial s.. interdental s. the bony portion separating two adjacent teeth in a dental arch. interlobular s. the connective tissue between secondary pulmonary lobules, usually containing a vein and lymphatics; seen radiographically when thickened as a Kerley B or septal line. intermediate cervical s. [TA] a thin s. composed of glia fiber and leptomeningeal connective tissue in the cervical spinal cord marking the border between the gracile fasciculi and cuneatus of the dorsal funiculus. SYN: s. cervicale intermedium [TA] . s. intermedium old term for the s. of the atrioventricular canal of the embryonic heart formed by the fusion of the dorsal and ventral atrioventricular canal cushions. intermuscular s. [TA] a term applied to aponeurotic sheets separating various muscles of the limbs; these are anterior and posterior crural intermuscular septa of leg (septa intermuscularis cruris anterius et posterius), lateral and medial femoral intermuscular septa (septa intermuscularis femoris laterale et mediale), lateral and medial intermuscular septa of arm (septa intermuscularis brachii laterale et mediale). SYN: s. intermusculare [TA] . s. intermusculare [TA] SYN: intermuscular s.. s. intermusculare vastoadductorium [TA] SYN: anteromedial intermuscular s.. interpulmonary s. SYN: mediastinum (2) . septa interradicularia mandi′bulae et ma′xillae [TA] SYN: interradicular septa of maxilla and mandible. interradicular septa of maxilla and mandible [TA] the bony partitions that project into the alveoli between the roots of the molar teeth. SYN: septa interradicularia mandi′bulae et ma′xillae [TA] , intra-alveolar septa. interventricular s. [TA] the wall between the ventricles of the heart. SYN: s. interventriculare [TA] , ventricular s.. s. interventriculare [TA] SYN: interventricular s.. s. linguae [TA] SYN: lingual s.. lingual s. [TA] the median vertical fibrous partition of the tongue merging posteriorly into the aponeurosis of the tongue. SYN: s. linguae [TA] , s. of tongue. s. lucidum SYN: s. pellucidum. s. mediastinale SYN: mediastinum (2) . s. membranaceum ventriculorum SYN: membranous part of interventricular s.. membranous s. 1. SYN: membranous part of nasal s.. 2. SYN: membranous part of interventricular s.. s. mobile nasi SYN: mobile part of nasal s.. s. musculare ventriculorum SYN: muscular part of interventricular s. (of heart). s. of musculotubal canal SYN: s. of pharyngotympanic (auditory) tube. nasal s. [TA] the wall dividing the nasal cavity into halves; it is composed of a central supporting skeleton covered on each side by a mucous membrane. SYN: s. nasi [TA] . s. nasi [TA] SYN: nasal s.. s. nasi osseum [TA] SYN: bony nasal s.. orbital s. [TA] a fibrous membrane attached to the margin of the orbit and extending into the lids, containing the orbital fat and constituting in great part the posterior fascia of the orbicularis oculi muscle. SYN: s. orbitale [TA] . s. orbitale [TA] SYN: orbital s.. pectiniform s., s. pectiniforme the anterior portion of the s. penis which is broken by a number of slitlike perforations. SYN: comblike s.. s. pellucidum [TA] a thin plate of brain tissue, containing nerve cells and numerous nerve fibers, that is stretched like a flat, vertical sheet between the column and body of fornix below, and the corpus callosum above and anteriorly; it is usually fused in the median plane with its partner on the opposite side so as to form a thin, median partition between the left and right frontal horn of the lateral ventricles; in less than 10% of humans there is a blind, slitlike, fluid-filled space between the two transparent septa, the cavity of s. pellucidum. The transparent s. is continuous ventralward through the interval between the corpus callosum and the anterior commissure with the precommissural s. and subcallosal gyrus. SEE ALSO: cavity of s. pellucidum, septal area. SYN: s. lucidum, transparent s.. s. penis [TA] the portion of the tunica albuginea incompletely separating the two corpora cavernosa of the penis. s. of pharyngotympanic (auditory) tube [TA] a very thin horizontal plate of bone forming two semicanals, the upper, smaller, for the tensor tympani muscle, and the lower, larger for the pharyngotympanic (auditory) tube; its termination in the middle ear is the processus cochleariformis. SYN: s. canalis musculotubarii, s. of musculotubal canal, s. tubae. placental septa incomplete partitions between placental cotyledons; they are covered with trophoblast and contain a core of maternal tissue. precommissural s. septal area. s. primum a crescentic s. in the embryonic heart that develops on the dorsocephalic wall of the originally single atrium and initiates its partitioning into right and left chambers; the tips of the s. grow toward and fuse with the atrioventricular canal cushions. proximal spiral s. spiral s.. rectovaginal s. [TA] the fascial layer between the vagina and the lower part of the rectum. SYN: s. rectovaginale [TA] . s. rectovaginale [TA] SYN: rectovaginal s.. rectovesical s. [TA] a fascial layer that extends superiorly from the central tendon of the perineum to the peritoneum between the prostate and rectum. SYN: s. rectovesicale [TA] , Denonvilliers aponeurosis, rectovesical fascia, Tyrrell fascia. s. rectovesicale [TA] SYN: rectovesical s.. scrotal s. [TA] an incomplete wall of connective tissue and nonstriated muscle (dartos fascia) dividing the scrotum into two sacs, each containing a testis. SYN: s. scroti [TA] . s. scroti [TA] SYN: scrotal s.. s. secundum the second of two major septal structures involved in the partitioning of the atrium, developing later than the s. primum and located to the right of it; like the s. primum, it is crescentic, but its tips are directed toward the sinus venosus, and it is more heavily muscular; it remains an incomplete partition until after birth, with its unclosed area constituting the foramen ovale. sinus s. a small fold forming the medial end of the valve of the inferior vena cava; it is developed from the dorsal wall of the embryonic sinus venosus. s. sinuum frontalium [TA] SYN: s. of frontal sinuses. s. sinuum sphenoidalium [TA] SYN: s. of sphenoidal sinuses. s. of sphenoidal sinuses [TA] the bony partition between the two sphenoidal sinuses, often deflected to one side of the midline. SYN: s. sinuum sphenoidalium [TA] . spiral s. a s. dividing the embryonic bulbus cordis into pulmonary and aortic outflow tracts from the developing heart; the distal spiral s. is derived from the right and left endocardial cushions and so separates the pulmonary and aortic orifices; the proximal spiral s. is the portion of the s. that is incorporated into the membranous part of the interventricular s.. spiral bulbar s. spiral s.. s. spurium a s. in the right atrium of the embryonic heart formed by the right venous valve and its continuation onto the dorsocephalic wall of the atrium; in human embryos, it reaches its fullest development during the third month and then undergoes regression, taking no part in atrial partitioning (hence its designation as false); reduced portions persist as the valve of the inferior vena cava and the valve of the coronary sinus. s. of testis SYN: mediastinum of testis. s. of tongue SYN: lingual s.. transparent s. SYN: s. pellucidum. transverse s. 1. SYN: ampullary crest. 2. the mesodermal mass separating the pericardial and peritoneal cavities; it is covered with mesothelium except where intimately associated with the liver, which originally develops within it; the s. is definitively incorporated into the diaphragm as the central tendon. s. tubae SYN: s. of pharyngotympanic (auditory) tube. urogenital s. the coronally placed ridge formed by the caudal portion of the urogenital ridges meeting in the midline of the embryo; it lies between the hindgut dorsally and the bladder ventrally. urorectal s. in embryos, a partition dividing the cloaca into a dorsal, rectal portion and a ventral portion called the urogenital sinus; reaching the cloacal membrane at about the time of its disintegration, the urorectal s. divides the cloacal exit into an anal and a urogenital orifice. SYN: urorectal fold. ventricular s. SYN: interventricular s..
sequela, pl .sequelae (se-kwel′a, se-kwel′e)
A condition following as a consequence of a disease. [L. s., a sequel, fr. sequor, to follow]
The succession, or following, of one thing or event after another. [L. sequor, to follow] Alu sequences in the human genome a repeated, relatively conserved s. of about 300 bp that often contains a cleavage site for the restriction enzyme AluI near the center; about 1 million copies in the human genome. chi s. an octomeric s. of bases in DNA that participates in RecBC-mediated genetic recombination. coding s. the portion of DNA that codes for transcription of messenger RNA. See exon. insertion s. discrete DNA sequences of nucleotides that are repeated at various sites on bacterial chromosomes, certain plasmids, and bacteriophages and that can move from one site to another on the chromosome, to another plasmid in the same bacterium, or to a bacteriophage. intervening s. SYN: intron. s. ladder The array of bands, made conspicuous by labeling, when DNA fragmented by endonucleases is subject to gel electrophoresis; corresponds to the nucleotide s.. leader sequences sequences at the end of either nucleic acids (DNA and RNA) or proteins that must be processed off to allow for a specific function of the mature molecule. long terminal repeat sequences (LTR) regions of the RNA genome associated with regulation, integration, and expression of retroviruses. monotonic s. a s. in which each value in a set is greater than the preceding value. palindromic s. palindrome. pulse s. in magnetic resonance imaging, a series of changes in the induced magnetic field, which include the phase and frequency-encoding gradients and read-out functions. regulatory s. any DNA s. that is responsible for the regulation of gene expression, such as promoters and operators. Shine-Dalgarno s. a purine-rich, untranslated region of mRNA upstream from the initiation codon in prokaryotes; assists in aligning the mRNA on the ribosome. termination s. SYN: termination codon. twin reversed arterial perfusion s. (TRAP) a circulatory anomaly in monozygotic twins wherein there are placental arterioarterial and venovenous anastomoses and umbilical anomalies, with one fetus being perfused with deoxygenated blood; the recipient fetus develops as an acardiac acephalic, and the pump or donor twin is at risk for cardiac failure.
The determination of the sequence of subunits in a macromolecule. dideoxy s. a method of s. DNA using 2′,3′-dideoxyribonucleoside triphosphates. Maxim-Gilbert s. a method of s. DNA using dimethyl sulfate and hydrazinolysis.
Occurring in sequence.
Plural of sequestrum.
Relating to a sequestrum.
1. Formation of a sequestrum. 2. Loss of blood or of its fluid content into spaces within the body so that it is withdrawn from the circulating volume, resulting in hemodynamic impairment, hypovolemia, hypotension, and reduced venous return to the heart. [L. sequestratio, fr. sequestro, pp. -atus, to lay aside] bronchopulmonary s. a congenital anomaly in which a mass of lung tissue becomes isolated, during development, from the rest of the lung; the bronchi in the mass are usually dilated or cystic and are not connected with the bronchial tree; it is supplied by a branch of the aorta.
Operative removal of a sequestrum. SYN: sequestrotomy. [sequestrum + G. ektome, excision]
SYN: sequestrectomy. [sequestrum + G. tome, incision]
sequestrum, pl .sequestra (se-kwes′trum, -tra)
A piece of necrotic tissue, usually bone, that has become separated from the surrounding healthy tissue. [Mod. L. use of Mediev. L. s., something laid aside, fr. L. sequestro, to lay aside, separate] primary s. a completely detached s..
Extrinsic allergic alveolitis caused by inhalation of redwood sawdust containing spores of Graphium, Pullularia, Aureobasidium, and other fungi. [Sequoia (genus name) for Sequoah (George Guess), Cherokee scholar, + G. -osis, condition]
Abbreviation for somatosensory evoked response. SEE ALSO: evoked response.
Symbol for serine and its radical.
Plural of serum.
SYN: serum albumin.
Accidental discovery; in science, finding one thing while looking for something else, as in Fleming's discovery of penicillin. [coined by Horace Walpole and relates to The Three Princes of Serendip, fr. alternate spelling of Serendib, ancient name for Sri Lanka]
Emile, French physician, 1867–1943. See S. white line, Bernard-S. syndrome.
series, pl .series (ser′ez)
1. A succession of similar objects following one another in space or time. 2. In chemistry, a group of substances, either elements or compounds, having similar properties or differing from each other in composition by a constant ratio. [L. fr. sero, to join together] aromatic s. all the compounds derived from benzene, or similar cyclic compounds that obey the Hückel rule, distinguished from those compounds that are acyclic or that contain rings that lack the conjugated double bond structure characteristic of benzene. erythrocytic s. the cells in the various stages of development in the red bone marrow leading to the formation of the erythrocyte, e.g., erythroblasts, normoblasts, erythrocytes. fatty s. the alkanes; all the acyclic compounds in the methane, ethane, propane, etc., group, as distinguished from the aromatic s.. granulocytic s. the cells in the several stages of development in the bone marrow leading to the mature granulocyte of the circulation, e.g., myeloblasts, different stages of the myelocyte, granulocytes. Hofmeister s. the s. of cations Mg2+, Ca2+, Sr2+, Ba2+, Li+, Na+, K+, Rb+, Cs+, and of anions citrate3−, tartrate2−, SO42−, acetate−, NO3−, CIO3−, I−, CNS− (among others), each s. arranged in order of decreasing ability to: 1) precipitate the dispersed substance of lyophilic sols; 2) “salt out” organic substances ( e.g., aniline, ethyl acetate) from aqueous solutions; or 3) inhibit the swelling of gels. These effects, among other related ones, are ascribable to the abstraction and binding of water by these ions ( i.e., hydration), which also decreases in the orders given, so that (in the monovalent cation s.) Li+, with the smallest crystal radius, has the largest hydrated radius, and vice versa for Cs+. SYN: lyotropic s.. homologous s. a s. of organic compounds, the succeeding members of which differ from each other by the radical CH2 (as in the fatty s.). lymphocytic s., lymphoid s. the cells at various states in the development in lymphoid tissue of the mature lymphocytes, e.g., lymphoblasts, young lymphocytes, mature lymphocytes. lyotropic s. SYN: Hofmeister s.. myeloid s. the granulocytic and the erythrocytic s.. small bowel s. radiographic examination of the small intestine following the oral administration of contrast medium, usually barium sulfate. Cf.:small bowel enema. thrombocytic s. the cells of successive stages in thrombocytic (platelet) development in the bone marrow, e.g., thromboblasts, thrombocytes. upper GI s. a radiographic contrast study of the esophagus, stomach, and duodenum.
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