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Medical Dictionary - Dictionary of Medicine and Human Biology


Medical Dictionary


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perazine (per′a-zen)
An antipsychotic.

percentile (per-sen′til)
The rank position of an individual in a serial array of data, stated in terms of what percentage of the group the individual equals or exceeds.

percept (per′sept)
1. That which is perceived; the complete mental image, formed by the process of perception, of an object or idea. 2. In clinical psychology, a single unit of perceptual report, such as one of the responses to an inkblot in the Rorschach test. [L. perceptum, a thing perceived]

perception (per-sep′shun)
The mental process of becoming aware of or recognizing an object or idea; primarily cognitive rather than affective or conative, although all three aspects are manifested. SYN: esthesia (1) . depth p. the visual ability to judge depth or distance. extrasensory p. (ESP) p. by means other than through the ordinary senses; e.g., telepathy, clairvoyance, precognition. simultaneous p. a combination of two slightly dissimilar images into a single image.

perceptive (per-sep′tiv)
Relating to or having a higher than normal power of perception.

perceptivity (per-sep-tiv′i-te)
The power of perception.

perceptorium (per-sep-tor′e-um)
SYN: sensorium (2) .

percolation (per-ko-la′shun)
1. SYN: filtration. 2. Extraction of the soluble portion of a solid mixture by passing a solvent liquid through it. 3. Passage of saliva or other fluids into the interface between tooth structure and restoration; sometimes induced by thermal changes. [L. percolatio, fr. per- + colare, to strain]

percolator (per′ko-la-ter)
A funnel-shaped vessel used for the process of percolation in pharmacy.

percomorph oil (per-ko-morf)
A liver oil from fish of the order Percomorphi, with a standardized amount of vitamins A and D.

per contiguum (per kon-tig′u-um)
In contiguity; denoting the mode by which an inflammation or other morbid process spreads into an adjacent contiguous structure. [per- + L. contiguus, touching, fr. tango, to touch]

per continuum (per kon-tin′u-um)
In continuity; continuous; denoting the mode by which an inflammation or other morbid process spreads from one part to another through continuous tissue. [per- + L. continuus, holding together, continuous, fr. teneo, to hold]

percuss (per-kus′)
To perform percussion.

percussion (per-kush′un)
1. A diagnostic procedure designed to determine the density of a body part by the sound produced by tapping the surface with the finger or a plessor; performed primarily over the chest to determine presence of normal air content in the lungs and over the abdomen to evaluate air in the loops of intestine and the size of solid organs such as the liver and spleen. 2. A form of massage, consisting of repeated blows or taps of varying force. [L. percussio, fr. per-cutio, pp. -cussus, to beat, fr. quatio, to shake, beat] auscultatory p. auscultation of the chest or other part at the same time that p. is made, to aid in hearing the sound made by p.. bimanual p. immediate p. in which the finger of one hand taps the other hand; a form of mediate p.. clavicular p. p., usually direct, along the entire clavicle to demonstrate dullness, particularly in apical pulmonary tuberculosis. deep p. heavy p. to obtain information about deeply situated organs or structures. direct p. SYN: immediate p.. finger p. p. in which a finger of one hand is used as a plessimeter and one of the other hand as a plessor. immediate p. the striking of the part under examination directly with the finger or a plessor, without the intervention of another finger or plessimeter. SYN: direct p.. mediate p. p. effected by the intervention of a finger or a plessimeter between the striking finger or plessor and the part percussed. Murphy p. examination for dullness by striking the chest wall directly with the fingertips of one hand successively, beginning with the fifth finger. SYN: piano p.. palpatory p. finger p. in which attention is focused upon the resistance and reverberation of the tissues under the finger as well as upon the sound elicited. SYN: plessesthesia. piano p. SYN: Murphy p.. threshold p. p. effected by means of a glass rod as a plessimeter, the rod being inclined to the wall of the chest or abdomen and touching it only by one extremity.

percussor (per-kus′er)
SYN: plessor.

percutaneous (per-ku-ta′ne-us)
Denoting the passage of substances through unbroken skin, as in absorption by inunction; also passage through the skin by needle puncture, including introduction of wires and catheters by Seldinger technique. SYN: transcutaneous, transdermic.

perencephaly (per-en-sef′a-le)
A condition marked by one or more cerebral cysts. [G. pera, a purse, a wallet, + enkephalos, brain]

Perez
George V., Spanish physician, &dag;1920. See P. sign.

Perez
Bernard, French physician, 1836–1903. See P. reflex.

perfectionism (per-fek′shun-izm)
A tendency to set rigid high standards of performance for oneself.

perflation (per-fla′shun)
Blowing air into or through a cavity or canal to force apart its walls or to expel any contained material. [L. per-flo, pp, -flatus, to blow through]

perflubron (per-floo′bron)
Generic name for perfluorooctyl bromide.

perfluorooctyl bromide (PFOB) (per-floo′ro-ok-til bro′mid)
A bromine-substituted fluorocarbon, prepared as a particulate emulsion, used as a CT, MR, and ultrasound contrast medium.

perforans (per′fo-rans)
A term applied to several muscles and nerves that, in their course, perforate other structures. [L. perforating]

perforated (per′fo-rat-ed)
Pierced with one or more holes. [L. perforatus, fr. per-foro, pp. -atus, to bore through]

perforation (per-fo-ra′shun)
Abnormal opening in a hollow organ or viscus. SYN: tresis. [see perforated]

perforator (per′for-a-ter)
An instrument for making a bony opening through the cranium. SYN: trephine (1) .

perforin (per′for-in)
A protein found in the cytoplasmic granules of both T cytotoxic lymphocytes and natural killer cells. This protein is implicated in target cell lysis by the above cells. [L. per-foro, to bore, pierce, + -in]

performic acid (per-for′mik)
An organic peracid used in cleaving disulfide links in peptides by oxidizing cystinyl residues to cysteic acid. SYN: peroxyformic acid.

perfrigeration (per-frij-er-a′shun)
A minor degree of frostbite. [L. per-frigero, pp. -atus, to make cold, fr. frigus, cold]

perfusate (per′fu-sat)
The fluid used for perfusion; sometimes more broadly applied to fluid that has been forced through any more or less porous membrane or material. [see perfuse]

perfuse (per-fyus′)
To force blood or other fluid to flow from the artery through the vascular bed of a tissue or to flow through the lumen of a hollow structure ( e.g., an isolated renal tubule). Cf.:perifuse, superfuse. [L. perfusio, fr. per- + fusio, a pouring]

perfusion (per-fu′zhun)
1. The act of perfusing. 2. The flow of blood or other perfusate per unit volume of tissue, as in ventilation/p. ratio. regional p. p. of part of the body, especially a limb, and particularly with chemotherapeutic agents, for treatment of a malignant tumor, primary, recurrent, or metastatic.

pergolide mesylate (per′go-lid)
An ergot derivative with dopaminergic properties; used in parkinsonism.

perhexiline maleate (per-hek′si-len)
A coronary vasodilator and diuretic.

perhydrocyclopenta[a]phenanthrene
SYN: tetracyclic steroid nucleus.

peri-
Around, about, near. Cf.:circum-. [G. around]

periaccretio pericardii (per′i-a-kre′she-o per-i-kar′de-i)
Adhesion of the pericardium or part of it to the cardiac surface due to antecedent inflammation.

periacinal, periacinous (per-e-as′i-nal, -i-nus)
Surrounding an acinus.

periadenitis (per′e-ad-e-ni′tis)
Inflammation of the tissues surrounding a gland. [peri- + G. aden, gland, + -itis, inflammation] p. mucosa necrotica recurrens SYN: aphthae major, under aphtha.

perianal (per-e-a′nal)
SYN: circumanal.

periangiocholitis (per′e-an′je-o-ko-li′tis)
SYN: pericholangitis. [peri- + G. angeion, vessel, + chole, bile, + -itis, inflammation]

periangitis (per′e-an-ji′tis)
Inflammation of the adventitia of a blood vessel or of the tissues surrounding it or a lymphatic vessel. SEE ALSO: periarteritis, periphlebitis, perilymphangitis. SYN: perivasculitis. [peri- + G. angeion, a vessel, + -itis, inflammation]

periaortic (per′e-a-or′tik)
Surrounding or adjacent to the aorta.




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