Entry 2 senses Webster, 1913 Bombycinous /(bŏm*bĭs"ĭ*nŭs)/ · Bom·byc·i·nous · IPA 01 a. Silken; made of silk. 1. Silken; made of silk.[Obs.] 2. Being of the color of the silkworm; transparent with a yellow tint.