n. In pathology, inflammation about the nail; whitlow.n. [capitalized] [NL. (A. L. de Jussieu, 1815).] A genus of apetalous plants of the order Illecebraceæ, type of the tribe Paronychieæ, known by the involucrate calyx of five hooded segments, each with a horn, point, or awn on the back.n. Plural of paronychium.