'Selacha' definitions:

Definition of 'Selacha'

From: GCIDE

Selachii \Se*la"chi*i\, n. pl. [NL., fr. Gr. ??? a fish having cartilages instead of bones.] (Zool.) An order of elasmobranchs including the sharks and rays; the Plagiostomi. Called also Selacha, Selache, and Selachoidei. [1913 Webster]