plural noun
Coe·​la·​can·​thi·​dae | \ˌsēləˈkan(t)thəˌdē\

Definition of Coelacanthidae 

: a family of crossopterygian fishes usually regarded as coextensive with the order Actinistia — compare latimeria

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Other Words from Coelacanthidae

coelacanthine \ ¦⸗⸗¦kanˌthīn, -​an(t)thə̇n \ adjective
coelacanthoid \ -​anˌthȯid \ adjective or noun
coelacanthous \ -​an(t)thəs \ adjective

History and Etymology for Coelacanthidae

New Latin, from Coelacanthus, type genus (from coel- + -acanthus) + -idae

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