Pentacrinus

noun Pen·tac·ri·nus \-nəs\

Definition of Pentacrinus

  1. :  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

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Origin and Etymology of pentacrinus

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


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