leptocephalus

noun lep·to·ceph·a·lus \ˌlep-tə-ˈse-fə-ləs\

plural lep·to·ceph·a·li\-ˌlī, -ˌlē\

Definition of LEPTOCEPHALUS

: a long thin small-headed transparent pelagic first larva of various eels

New Latin, from Greek leptos + kephalē head — more at cephalic

First Known Use: 1769

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