1. A small circumscribed area differing in color or structure from the surrounding surface. 2. In dermatology, a flat area greater than 1.0 cm in diameter. 3. An intermediate stage in the formation of a cap on the surface of a cell.
- butterfly p. SYN: butterfly (2).
- p. clamping a technique used in the study of ion channels in which the movement of ions across a small p. of isolated membrane is measured when the membrane is electrically polarized or hyperpolarized and maintained at that potential. SYN: p. clamp.
- cotton-wool patches white, fuzzy areas on the surface of the retina (accumulations of cellular organelles) caused by damage (usually infarction) of the retinal fiber layer. SYN: cotton-wool spots.
- herald p. the initial rapidly enlarging oval-shaped red papulosquamous lesion, usually on the trunk, heralding the widespread eruption of pityriasis rosea, and preceding the latter by 7–14 days.
- Hutchinson p. SYN: salmon p..
- mucous p. an oval to round, yellow-gray to white, membrane-covered lesion or lesions occurring on the mucous membranes; usually seen in secondary syphilis.
- Peyer patches SYN: aggregated lymphoid nodules of small intestine, under nodule.
- salmon p. 1. an intraretinal hemorrhage seen in sickle cell retinopathy; 2. the appearance of an orbital lymphoid tumor as seen in the subconjunctival space; 3. a common macular orange-pink to red vascular malformation present at or near birth on the head and neck that involutes during childhood. SYN: Hutchinson p..
- shagreen p. SYN: shagreen skin.
- smoker's patches SYN: leukoplakia.
- soldier's patches SYN: milk spots (1), under spot.
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planned approach to community health

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patch 'pach n
1 a) a piece of material used medically usu. to cover a wound or repair a defect see PATCH GRAFT
b) a usu. disk-shaped piece of material that is worn on the skin and contains a substance (as a drug) that is absorbed at a constant rate through the skin and into the bloodstream <a nicotine \patch> called also skin patch
c) a shield worn over the socket of an injured or missing eye
2) a circumscribed region of tissue (as on the skin or in a section from an organ) that differs from the normal color or composition <sometimes great white \patches develop on the tongue, the cheeks, and the gums (Morris Fishbein)>
patch vt
patchy adj, patch·i·er; -est

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(pach) [L. pittacium; Gr. pittakion] 1. any area that differs in color or texture from the surrounding surface and is not elevated above it; see also macule and spot. 2. a small piece of cloth or other material that covers part of another surface. a 3. macule more than 1 cm in diameter.

Medical dictionary. 2011.

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  • Patch — Patch, n. [OE. pacche; of uncertain origin, perh. for placche; cf. Prov. E. platch patch, LG. plakk, plakke.] 1. A piece of cloth, or other suitable material, sewed or otherwise fixed upon a garment to repair or strengthen it, esp. upon an old… …   The Collaborative International Dictionary of English

  • patch — ► NOUN 1) a piece of material used to mend a hole or strengthen a weak point. 2) a small area differing in colour, composition, or texture from its surroundings. 3) a small plot of land: a cabbage patch. 4) Brit. informal a brief period of time:… …   English terms dictionary

  • Patch — Patch, v. t. [imp. & p. p. {Patched}; p. pr. & vb. n. {Patching}.] 1. To mend by sewing on a piece or pieces of cloth, leather, or the like; as, to patch a coat. [1913 Webster] 2. To mend with pieces; to repair with pieces festened on; to repair… …   The Collaborative International Dictionary of English

  • patch — [ patʃ ] n. m. • 1970; mot angl. « pièce » ♦ Anglic. 1 ♦ Timbre autocollant qui dispense un médicament, une substance par voie percutanée. 2 ♦ Morceau de tissu veineux utilisé pour élargir le diamètre d un vaisseau sanguin. Recomm. offic. pièce.… …   Encyclopédie Universelle

  • patch — UK US /pætʃ/ noun [C] ► IT a small computer program that can repair a problem with software: »You can download a patch to fix the problem. ● go through/hit a bad/difficult/rough patch Cf. hit a rough patch …   Financial and business terms

  • Patch — Saltar a navegación, búsqueda Puede referirse a Parche en computación. Puede referirse a Wolverine, un superhéroe de Marvel Comics Puede referirse a Patch, un personaje de La Tribu Obtenido de Patch Categoría: Wikipedia:Desambiguación …   Wikipedia Español

  • patch — [n1] piece, spot, area bit, blob, chunk, fix, ground, hunk, land, lot, plat, plot, scrap, shred, stretch, strip, tract; concepts 452,471,513 patch [n2] piece applied to cover a gap or lack application, appliqué, Band Aid*, mend, reinforcement;… …   New thesaurus

  • patch|y — «PACH ee», adjective, patch|i|er, patch|i|est. 1. abounding in or characterized by patches: »land patchy with rock. 2. occurring in, forming, or resembling patches: »a …   Useful english dictionary

  • Patch — 〈[pæ̣tʃ] m. od. n.; Gen.: od. s, Pl.: s〉 1. 〈EDV〉 (meist kostenlos zur Verfügung gestelltes) Softwareprogramm, das in einem vorhandenen Programm enthaltene Fehler od. Mängel beheben soll; →a. s. Bug, Update 2. 〈Med.〉 zur Transplantation operativ… …   Lexikalische Deutsches Wörterbuch

  • Patch — [pạ̈tsch; aus engl. patch = Fleck, Flicken] s; [s], s: Hautlappen zur Deckung von Weichteildefekten …   Das Wörterbuch medizinischer Fachausdrücke

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