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Medical Dictionary


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pearl-ash
SYN: potash.

Pearson
Karl, English mathematician, 1857–1936. See Poisson-P. formula, McArdle-Schmid-P. disease.

peau d'orange (po-do-rahnj′)
A swollen pitted skin surface overlying carcinoma of the breast in which there is both stromal infiltration and lymphatic obstruction with edema. [Fr. orange peel]

peccant (pek′ant)
Unhealthy; producing disease. [L. peccans (-ant-), pres. p. of pecco, to sin]

peccatiphobia (pek′ka-ti-fo′be-a)
Morbid fear of sinning. [L. peccatum,, sin, + G. phobos, fear]

pecilo-
See poikilo-.

pecilocin (pe-sil′o-sin)
An antifungal agent.

Pecquet
Jean, French anatomist, 1622–1674. See P. cistern, P. duct, receptaculum pecqueti, P. reservoir.

pectase (pek′tas)
An enzyme that converts pectin to d-galacturonic acid (pectic acid); used in the treatment of certain foodstuffs. SYN: pectinesterase.

pecten (pek′ten)
1. [NA] A structure with comblike processes or projections. 2. SYN: anal p.. [L. comb] anal p. [TA] the middle third of the surgical anal canal; upper half of anatomic anal canal extends between pectinate line and the intersphincteric groove, and is lined with anoderm. SYN: p. analis [TA] , p. (2) . p. analis [TA] SYN: anal p.. p. ossis pubis [TA] SYN: p. pubis. p. pubis [TA] the continuation on the superior ramus pubis of the linea terminalis, forming a sharp ridge. SYN: p. ossis pubis [TA] , pectineal line of pubis.

pectenitis (pek-ten-i′tis)
Inflammation of the sphincter ani. [L. pecten, a comb, + G. -itis, inflammation]

pectenosis (pek-ten-o′sis)
Exaggerated enlargement of the pecten band.

pectic (pek′tik)
Relating to any of the substances or materials now referred to as pectin. [G. pektos, stiff, curdled]

pectic acid
SYN: d-galacturonic acid.

pectin (pek′tin)
1. Broad generic term for what are now called pectic substances or materials; specifically, a gelatinous substance, consisting largely of long chains of mostly d-galacturonic acid units (typically α-1,4 linkages and sometimes present as methyl esters), that is extracted from fruits where it is presumed to exist as protopectin (pectose). 2. Commercial pectins, sometimes called pectinic acid, are whitish, soluble powders prepared from the rinds of citrus fruits. They are used in the preparation of jams, jellies, and similar food products where they enhance viscosity; therapeutically, they are used to control diarrhea (usually in conjunction with other agents), as a plasma expander, and as a protectant; pectins bind calcium ions and are highly hydrated. p. lyase an enzyme that catalyzes the elimination of 6-methyl-Δ-4,5-d-galacturonate residues from p.; thus, it brings about depolymerization; it does not act on deesterified p.; used in the treatment of certain foodstuffs.

pectinase (pek′tin-as)
SYN: polygalacturonase.

pectinate (pek′ti-nat)
1. Combed; comb-shaped. SYN: pectiniform. 2. In fungi, used to describe a particular type of branching hyphae in cultures of dermatophytes.

pectineal (pek-tin′e-al)
Ridged; relating to the os pubis or to any comblike structure. SYN: pectineus (1) .

pectinesterase (pek-tin-es′ter-as)
SYN: pectase.

pectineus (pek′ti-ne′us)
1. SYN: pectineal. 2. See p. (muscle). [L.]

pectinic acids (pek-tin′ik)
Term sometimes used for commercial pectins.

pectiniform (pek-tin′i-form)
SYN: pectinate (1) .

pectization (pek-ti-za′shun)
In colloidal chemistry, coagulation. [G. pektikos, curdling]

pectoral (pek′to-ral)
Relating to the chest. [L. pectoralis; fr. pectus, breast bone]

pectoralgia (pek-to-ral′je-a)
Pain in the chest. [L. pectus (pector-), chest, + G. algos, pain]

pectoriloquy (pek-to-ril′o-kwe)
Increased transmission of the voice sound through the pulmonary structures, so that it is clearly audible on auscultation of the chest; usually indicates consolidation of the underlying lung parenchyma. SYN: pectorophony. [L. pectus, chest, + loquor, to speak] aphonic p. SYN: Baccelli sign. whispered p., whispering p. p. of whispered sounds in the same fashion as that of voice sounds. SYN: whispered bronchophony.

pectorophony (pek-to-rof′o-ne)
SYN: pectoriloquy. [L. pectus, chest, + G. phone, voice]

pectose (pek′tos)
See pectin, protopectin.

pectous (pek′tus)
1. Relating to or consisting of pectin or pectose. 2. Denoting a firm coagulated condition sometimes assumed by a gel, which is permanent in that the substance cannot be made to reassume the gel form.

pectus, gen. pectoris, pl .pectora (pek′tus, pek′to-ris, pek′to-ra)
SYN: chest. [L.] p. carinatum flattening of the chest on either side with forward projection of the sternum resembling the keel of a boat. SYN: chicken breast, keeled chest, pigeon breast, pigeon chest. p. excavatum a hollow at the lower part of the chest caused by a backward displacement of the xiphoid cartilage. SYN: foveated chest, funnel chest, funnel breast, koilosternia, p. recurvatum, trichterbrust. p. recurvatum SYN: p. excavatum.

ped-, pedi-, pedo-
1. Child. [G. pais, child] 2. Foot, feet. [L. pes, foot]

pedal (ped′al)
Relating to the feet, or to any structure called pes. [L. pedalis, fr. pes (ped-), a foot]

pedatrophia, pedatrophy (ped-a-tro′fe-a, -at′ro-fe)
SYN: marasmus. [G. pais (paid-), child, + atrophy]

pederast (ped′er-ast)
One who practices pederasty.

pederasty (ped′er-as-te)
Homosexual anal intercourse, especially when practiced on boys. [G. paiderastia; fr. pais (paid-), boy, + erao, to long for]

Pedersen speculum
See under speculum.

pedesis (pe-de′sis)
SYN: brownian movement. [G. p., a leaping]

pedi-
See ped-.

pediatric (pe-de-at′rik)
Relating to pediatrics. [G. pais (paid-), child, + iatrikos, relating to medicine]

pediatrician (pe′de-a-trish′an)
A specialist in pediatrics. SYN: pediatrist.

pediatrics (pe-de-at′riks)
The medical specialty concerned with the study and treatment of children in health and disease during development from birth through adolescence. [G. pais (paid-), child, + iatreia, medical treatment]

pediatrist (pe-de-at′rist)
SYN: pediatrician.

pediatry (pe′de-at-re, pe-di′a-tre)
A rarely used term for pediatrics

pedicel (ped′i-sel)
The secondary process of a podocyte, which helps form the visceral capsule of a renal corpuscle. SYN: footplate (2) , foot-plate&star, foot process. [Mod. L. pedicellus, dim. of L. pes, foot]

pedicellate (ped′i-sel-lat)
SYN: pediculate.

pedicellation (ped′i-se-la′shun)
Formation of a pedicle or peduncle.




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