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The Collaborative International Dictionary
Encrinus

Encrinus \En"cri*nus\, n.; pl. Encrini. [NL. See Encrinite.] (Paleon.) A genus of fossil encrinoidea, from the Mesozoic rocks.

Wiktionary
encrinus

n. (context paleontology English) Any of a genus (taxlink Encrinus genus) of fossil encrinoidea from the Mesozoic rocks.

Wikipedia
Encrinus

Encrinus is an extinct genus of crinoid, and "one of the most famous". It lived during the Middle Triassic, and its fossils have been found in Europe.