pentacrinoid

noun
pen·​tac·​ri·​noid | \-ˌnȯid\
plural -s

Definition of pentacrinoid 

: a larval form of some crinoids (as members of the genus Antedon) resembling crinoids of the genus Pentacrinus

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History and Etymology for pentacrinoid

New Latin Pentacrinus + English -oid

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