Elasmobranchii \E*las`mo*bran"chi*i\, n. pl. [NL., fr. Gr. ? a metal plate + L. branchia a gill.]

(Zo["o]l.) A subclass of fishes, comprising the sharks, the rays, and the Chim[ae]ra. The skeleton is mainly cartilaginous.

Source: Webster's Revised Unabridged Dictionary (1913)