The Collaborative International Dictionary of English v.0.48:
Batoidei \Ba*toi"de*i\, n. pl. [NL., fr. Gr. ba`tos a kind of ray + -oid.] (Zool.) The division of fishes which includes the rays and skates. [1913 Webster]WordNet (r) 3.0 (2006):
Batoidei n 1: fish with dorsoventrally flattened bodies; includes: rays; skates; guitarfishes; sawfishes [syn: Rajiformes, order Rajiformes, Batoidei, order Batoidei]