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Actinocrinus

noun
Ac·​ti·​no·​cri·​nus | \ˌak-tə-(ˌ)nō-ˈkrī-nəs\

Definition of Actinocrinus 

: a genus (the type of the family Actinocrinidae) of crinoids abundant in the Mississippian rocks of America and Europe

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First Known Use of Actinocrinus

1841, in the meaning defined above

History and Etymology for Actinocrinus

New Latin, from actin- + -crinus

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The first known use of Actinocrinus was in 1841

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