CALICLE

Noun

calicle (plural calicles)

(zoology) Any cup-shaped depression.

(botany, zoology) A calyculus.

Source: Wiktionary

Cal"i*cle, n. Etym: [L. caliculus a small cup, dim. of calicis, a cup. Cf Calycle.] (Zoöl.) (a) One of the small cuplike cavities, often with elevated borders, covering the surface of most corals. Each is formed by a polyp. (b) One of the cuplike structures inclosing the zooids of certain hydroids. See Campanularian. [Written also calycle. See Calycle.]

Source: Webster’s Unabridged Dictionary 1913 Edition