Main Entry: se·la·chi·an

Pronunciation: \sə-ˈlā-kē-ən\

Function: noun

Etymology: ultimately from Greek selachos cartilaginous phosphorescent fish; akin to Greek selas brightness

Date: 1835

: any of a variously classified group (Selachii) of cartilaginous fishes that includes the existing sharks and typically most related elasmobranchs (as rays)

— selachian adjective