adj. & n. --adj. 1 (of a fish-scale) consisting of a hard base embedded in the skin and a spiny backward projection (cf. CTENOID). 2 (of a fish) covered with these scales. --n. a placoid fish, e.g. a shark. [Gk plax plakos flat plate]
PLACOID
Meaning of PLACOID in English
English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012