encrinus
noun
en·cri·nus
enˈkrīnəs,
eŋˈ-
1
capitalized : a genus (the type of the family Encrinidae) of extinct stalked crinoids whose remains are abundant in some Triassic formations (as in beds of limestone formed chiefly of fragments of their stalks)
2
plural encrini
-ˌnī
: a crinoid of the genus Encrinus 
Word History
Etymology
New Latin, from en- entry 2 + -crinus (from Greek krinon lily)