SG Heritage Dictionary

Silkworm [Noun] Webster's Dictionary 1828

The worm which produces silk, of the genus Phalaena. Silk-worms are said to have been first introduced into the Roman empire from China, in the reign of Justinian.

Silkworm [Noun] Webster's Dictionary 1913

The larva of any one of numerous species of bombycid moths, which spins a large amount of strong silk in constructing its cocoon before changing to a pupa.