PLAQUE

brass, memorial tablet, plaque

(noun) a memorial made of brass

plaque

(noun) (pathology) a small abnormal patch on or inside the body

Source: WordNet® 3.1

Etymology

Noun

plaque (countable and uncountable, plural plaques)

(countable) Any flat, thin piece of clay, ivory, metal, etc, used for ornament, or for painting pictures upon, as a dish, plate, slab, etc, hung upon a wall; also, a smaller decoration worn by a person, such as a brooch.

(countable) A piece of flat metal with writing on it, attached to a building, monument, or other structure to remind people of a person or an event.

(countable) A small card representing an amount of money, used for betting in casinos; a sort of gaming chip.

(countable, biology) A clearing in a bacterial lawn caused by a virus.

(countable, musical instruments) In the Hornbostel–Sachs classification system: any flat, thin musical instrument.

(countable, pathology) A broad patch of abnormal tissue distinguishable from surrounding tissue, especially a broad papule (“inflamed, irritated patch”) on the skin.

(countable, uncountable, pathology) An abnormal accumulation of material in or on an organ of the body, often associated with disease.

(countable, uncountable, pathology) An accumulation in artery walls made up of macrophage cells and debris containing lipids, (cholesterol and fatty acids), calcium, and connective tissue; an atheroma.

(uncountable, dentistry) An accumulation of biofilm, or bacteria, on teeth.

Source: Wiktionary

Plaque, n. Etym: [F. Cf. Plack, and see Placard.]

Definition: Any flat, thin piece of metal, clay, ivory, or the like, used for ornament, or for painting pictures upon, as a slab, plate, dish, or the like, hung upon a wall; also, a smaller decoration worn on the person, as a brooch.

Source: Webster’s Unabridged Dictionary 1913 Edition