(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.

plural of plaque

(pathology, dentistry) Covered with plaque

The formation of a plaque.

(alternative medicine) A supposed combination of harmful mucus-like material and food residue, claimed to exist as a coating on the gastrointestinal tract.

(chiefly UK) A permanent sign installed in a public place to commemorate a historical link between that location and a famous person, event, or former building on the site.

plural of blue plaque

(medicine) A pruritic rash condition appearing during and after pregnancy in some women.

plural of plaquette

A small metal tablet decorated in bas-relief, usually with a design including figures. / (physics) The smallest closed loop, enclosing the region between four lattice sites, in lattice gauge theory.