The Collaborative International Dictionary of English v.0.48:
Bombycid \Bom*by"cid\, a. (Zool.) Like or pertaining to the genus Bombyx, or the family Bombycid[ae]. [1913 Webster]WordNet (r) 3.0 (2006):
bombycid n 1: moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk [syn: bombycid, bombycid moth, silkworm moth]