Source : Webster's Revised Unabridged Dictionary (1913)

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 : WordNet®

Elasmobranchii
     n : sharks; rays; dogfishes; skates [syn: {subclass
         Elasmobranchii}, {Selachii}, {subclass Selachii}]