pentacrinoid
/pɛnˈtakrɪnɔɪd/Zoology
adjective
Designating a larval stage of a crinoid at which it resembles a crinoid of the genus Pentacrinus in having a stalk and a calyx consisting of five plates.
noun
A larval crinoid which resembles a crinoid of the genus Pentacrinus.
Origin
Mid 19th century; earliest use found in Proceedings of the Royal Society of London. From scientific Latin Pentacrinus + -oid, perhaps after crinoid.