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Medical Dictionary


mesiogingival (me′ze-o-jin′ji-val)
Relating to the angle formed by the junction of the mesial surface with the gingival line of a tooth.

mesiognathic (me′ze-o-nath′ik)
Denoting malposition of one or both jaws forward from their normal position.

mesioincisal (me′ze-o-in-si′sal, -zal)
Relating to the mesial and incisal surfaces of a tooth; denoting the angle formed by their junction.

mesiolabial (me′ze-o-la′be-al)
Relating to the mesial and labial surfaces of a tooth; denoting especially the angle formed by their junction.

mesiolingual (me′ze-o-ling′gwal)
Relating to the mesial and lingual surfaces of a tooth; denoting especially the angle formed by their junction.

mesiolinguo-occlusal (me′ze-o-ling′gwo-o-kloo′sal, -zal)
Denoting the angle formed by the junction of the mesial, lingual, and occlusal surfaces of a bicuspid or molar tooth.

mesiolinguopulpal (me′ze-o-ling′gwo-pul′pal)
Relating to the angle denoting the junction of the mesial, lingual, and pulpal surfaces in a tooth cavity preparation.

mesio-occlusal (me′ze-o-o-kloo′sal, -zal)
Denoting the angle formed by the junction of the mesial and occlusal surfaces of a bicuspid or molar tooth.

mesio-occlusion (me′ze-o-o-kloo′zhun)
SYN: mesial occlusion (1) .

mesioplacement (me′ze-o-plas′ment)
SYN: mesioversion.

mesiopulpal (me′ze-o-pul′pal)
Pertaining to the inner wall or floor of a cavity preparation on the mesial side of a tooth.

mesioversion (me′ze-o-ver-zhun)
Malposition of a tooth mesial to normal, in an anterior direction following the curvature of the dental arch. SYN: mesial displacement, mesioplacement.

F. A., Austrian physician, 1733–1815. See mesmerism.

mesmerism (mes′mer-izm)
A system of therapeutics from which were developed hypnotism and therapeutic suggestion. [F.A. Mesmer, Austrian physician, 1734–1815]

mesmerize (mes′mer-iz)
Obsolete term for hypnotize. [see mesmerism]

meso-, mes-
1. Middle, mean, intermediacy. 2. A mesentery, mesentery-like structure. 3. A prefix denoting a compound, containing more than one chiral center, having an internal plane of symmetry; such compounds do not exhibit optical activity ( e.g., meso-cystine). [G. mesos]

mesoappendix (mez′o-a-pen′diks) [TA]
The short mesentery of the appendix lying behind the terminal ileum, in which the appendicular artery courses. SYN: mesenteriolum processus vermiformis, mesentery of appendix.

mesoarium (mez-o-ar′e-um)
SYN: mesovarium.

mesobilane (mez-o-bi′lan)
A reduced mesobilirubin with no double bonds between the pyrrole rings and, consequently, colorless. SEE ALSO: bilirubinoids. SYN: mesobilirubinogen, urobilinogen IXα.

mesobilene, mesobilene- (mez-o-bi′len)
A bilirubinoid. See urobilin. SYN: urobilin IXα.

mesobilirubin (mez′o-bil-i-roo′bin)
A compound differing from bilirubin only in that the vinyl groups of bilirubin are reduced to ethyl groups. SEE ALSO: bilirubinoids.

mesobilirubinogen (mez′o-bil-i-roo-bin′o-jen)
SYN: mesobilane.

mesobiliviolin (mez′o-bil-i-vi-o′lin)
A bilirubinoid.

mesoblast (mez′o-blast)
SYN: mesoderm. [meso- + G. blastos, germ]

mesoblastema (mez′o-blas-te′ma)
All the cells collectively which constitute the early undifferentiated mesoderm. [meso- + G. blastema, a sprout]

mesoblastemic (mez′o-blas-te′mik)
Relating to or derived from the mesoblastema.

mesoblastic (mez′o-blas′tik)
Relating to or derived from the mesoderm.

mesocardia (mez′o-kar′de-a)
1. Atypical position of the heart in a central position in the chest, as in early embryonic life. 2. Plural of mesocardium. [meso- + G. kardia, heart]

mesocardium, pl .mesocardia (mez-o-kar′de-um)
The double layer of splanchnic mesoderm supporting the embryonic heart in the pericardial cavity. It disappears before birth. [meso- + G. kardia, heart] dorsal m. the part of the m. dorsal to the embryonic heart; it breaks down to form the transverse sinus of the pericardium. ventral m. the part of the m. ventral to the embryonic cardiac tube; transitory in all vertebrates; in the higher mammals, it breaks through as soon as its component layers of epicardium make contact with each other.

mesocarpal (mez′o-kar′pal)
SYN: midcarpal.

mesocecal (mez′o-se′kal)
Relating to the mesocecum.

mesocecum (mez′o-se′kum)
Part of the mesocolon, supporting the cecum, that occasionally persists when the ascending colon becomes retroperitoneal during fetal life. SYN: mesentery of cecum. [meso- + cecum]

mesocephalic (mez′o-se-fal′ik)
Having a head of medium length; denoting a skull with a cephalic index between 75 and 80 and with a capacity of 1350 to 1450 ml, or an individual with such a skull. SYN: mesaticephalic, mesocephalous, normocephalic. [meso- + G. kephale, head]

mesocephalous (mez′o-sef′a-lus)
SYN: mesocephalic.

Mesocestoides (mez-o-ses-toy′dez)
Tapeworm genus found in carnivorous mammals, such as foxes; mites probably intermediate hosts; few human cases identified in Japan, the United States, and China.

mesocolic (mez′o-kol′ik)
Relating to the mesocolon.

mesocolon (mez′o-ko′lon) [TA]
The fold of peritoneum attaching the colon to the posterior abdominal wall; ascending m. [TA] (m. ascendens [TA]), transverse m. [TA] (m. transversum [TA]), descending m. [TA] (m. descendens [TA]), and sigmoid m. [TA] (m. sigmoideum [TA]) correspond to the respective divisions of the colon; the ascending and descending portions are usually fused to the peritoneum of the posterior abdominal wall, but can be mobilized. [meso- + kolon, colon]

mesocolopexy (mez′o-ko′lo-pek-se)
An operation for shortening the mesocolon, for correction of undue mobility and ptosis. SYN: mesocoloplication. [meso- + G. kolon, colon, + pexis, fixation]

mesocoloplication (mes′o-ko′lo-pli-ka′shun)
SYN: mesocolopexy. [meso- + G. kolon, colon, + L. plico, pp. -atus, to fold]

mesocord (mez′o-kord)
A fold of amnion that sometimes binds a segment of the umbilical cord to the placenta.

mesocuneiform (mez-o-koo′ne-i-form)
SYN: intermediate cuneiform (bone).

mesoderm (mez′o-derm)
The middle of the three primary germ layers of the embryo (the others being ectoderm and endoderm); m. is the origin of connective tissues, myoblasts, blood, the cardiovascular and lymphatic systems, most of the urogenital system, and the lining of the pericardial, pleural, and peritoneal cavities. SYN: mesoblast. [meso- + G. derma, skin] branchial m. m. surrounding the primitive stomodeum and pharynx; it contributes to the pharyngeal arches. extraembryonic m. extraembryonic cells which, though derived from the zygote, are not part of the embryo proper and contribute to the fetal membranes ( e.g., amnion). SYN: primary m.. gastral m. m. in lower vertebrates formed by constriction from the roof of the archenteron or yolk sac. intermediate m. a continuous band of m. between the segmented paraxial m. medially and the lateral plate m. laterally; from it develops the nephrogenic cord. intraembryonic m. m. derived from the primitive streak and lying between the ectoderm and endoderm. SYN: secondary m.. lateral m. SYN: lateral plate m.. lateral plate m. the peripheral portion of intraembryonic m. that is continuous with the extraembryonic m. beyond the margins of the embryonic disk; it forms the somatic and splanchnic m. between which develops the intraembryonic celom. SYN: lateral m.. paraxial m. the m. lying at either side of the midline embryonic notochord; on segmentation, it forms the paired somites. primary m. SYN: extraembryonic m.. prostomial m. m. that arises in lower vertebrates by continued proliferation at the lateral lips of the blastopore. secondary m. SYN: intraembryonic m.. somatic m. the m. adjacent to the ectoderm in the early embryo, after formation of the intraembryonic celom; the limbs and body wall are derived, in part, from it. somitic m. m. derived from cells situated in or derived from somites. splanchnic m. the layer of lateral plate m. adjacent to the endoderm. visceral m. the splanchnic m. or the branchial m..

mesodermal (mez-o-der′mal)
Pertaining to the mesoderm.

mesodermic (mez-o-der′mik)
Relating to the mesoderm.

mesodiastolic (mez-o-di-a-stol′ik)

mesodont (mez′o-dont)
Having teeth of medium size; denoting a skull with a dental index between 42 and 43.9. [meso- + G. odous, tooth]

mesoduodenal (mez′o-doo-o-de′nal)
Relating to the mesoduodenum.

mesoduodenum (mez′o-doo′o-de′num, -doo-od′e-num)
The mesentery of the duodenum.

mesoenteriolum (mes′o-en-ter-e′o-lum)
SYN: mesenteriolum.

mesoepididymis (mez-o-ep-i-did′i-mis)
An occasional fold of the tunica vaginalis binding the epididymis to the testis. [meso- + epididymis]

mesogaster (mez-o-gas′ter)
SYN: mesogastrium.

mesogastric (mez-o-gas′trik)
Relating to the mesogastrium.

mesogastrium (mez-o-gas′tre-um)
In the embryo, the mesentery of the dilated portion of the enteric canal that is the future stomach; it gives rise to the greater omentum and consequently is involved in the formation of the omental bursa. The spleen and body of the pancreas develop within it, and thus the splenorenal and gastrosplenic ligaments are derivatives of the (dorsal) m.. SYN: dorsal m., mesogaster. [meso- + G. gaster stomach] dorsal m. SYN: m.. ventral m. the primitive midline mesentery extending between future stomach and proximal duodenum and the anterior abdominal wall superior to the umbilicus (umbilical vein). The liver develops within it, and consequently the lesser omentum, coronary and falciform ligaments are derivatives of it. The umbilical vein runs in its caudal free edge, becoming the postnatal round ligament of the liver.

mesogenic (mez-o-jen′ik)
Denoting the virulence of a virus capable of inducing lethal infection in embryonic hosts, after a short incubation period, and an inapparent infection in immature and adult hosts; used in characterizing Newcastle disease virus, particularly strains used in parenteral vaccination of chickens. [meso- + G. -gen, producing]

mesoglia (me-sog′le-a)
Neuroglial cells of mesodermal origin. SEE ALSO: microglia. SYN: mesoglial cells. [meso- + G. glia, glue]

mesogluteal (mez′o-gloo′te-al)
Relating to the musculus gluteus medius.

mesogluteus (mez′o-gloo-te′us)
SYN: gluteus medius (muscle).

mesognathic (mez-o-nath′ik, -og-nath′ik)
1. Relating to the mesognathion. 2. SYN: mesognathous.

mesognathion (mez′o-na′the-on, -og-na′the-on, nath′e-on)
The lateral segment of the premaxillary or incisive bone external to the endognathion. [meso- + G. gnathos, jaw]

mesognathous (me-zog′na-thus)
Having a face with slightly projecting jaw, one with a gnathic index from 98 to 103. SYN: mesognathic (2) .

mesoileum (mez-o-il′e-um)
The mesentery of the ileum.

mesojejunum (mez′o-je-joo′num)
The mesentery of the jejunum.

mesolobus (me-sol′o-bus)
Obsolete term for corpus callosum. [meso- + L. lobus, lobe]

mesolymphocyte (mez-o-lim′fo-sit)
A mononuclear leukocyte of medium size, probably a lymphocyte, with a deeply staining nucleus of large size but relatively smaller than that in most lymphocytes. [meso- + lymphocyte]

mesomelia (mez-o-me′le-a)
The condition of having abnormally short forearms and lower legs. [meso- + G. melos, limb]

mesomelic (mez-o-me′lik)
Pertaining to the middle segment of a limb.

mesomere (mez′o-mer)
1. A blastomere of a size intermediate between a macromere and a micromere. 2. The zone between an epimere and a hypomere. [meso- + G. meros, part]

mesomeric (mez-o-mer′ik)
Pertaining to mesomerism.

mesomerism (me-som′er-izm)
Displacement or delocalization of electrons within a molecule in such a way as to create fractional charges on different parts of the molecule; resonance.

mesometrium (mez′o-me′tre-um)
The broad ligament of the uterus, below the mesosalpinx. [meso- + G. metra, uterus]


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