silkworm moth

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various moths, chiefly of the families Bombycidae and Saturniidae, whose larvae produce silk cocoons.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk
• noun any silkworm moth of the family Saturniidae