Pentacrinus

noun

Pen·​tac·​ri·​nus

-nəs

: a genus (the type of the family Pentacrinidae) comprising large stalked Jurassic crinoids having a small bowl-shaped calyx, strong numerously branched and pinnulate arms, and a pentangular stalk

Word History

Etymology

New Latin, from penta- (from Greek) + -crinus

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