Crossword clue: a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp)

The most common answer is calycle (7 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

calycle 7 letters wn-def

a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp)

calyculus 9 letters wn-def

a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp)