1) Arthropod genus 2) Genus bombyx 
Bombyx is the genus of true silkmoths or mulberry silkmoths of the family Bombycidae. For a few thousand years, people only recognised 2 species, but then several other less important species were discovered, and the genus contains 2 tested hybrid species- a semi-natural cross between a female Bombyx mori and a male Bombyx mandarina, and an other ...
• (n.) A genus of moths, which includes the silkworm moth. See Silkworm.
Bom'byx (bŏm'bĭks) noun [ Latin , silkworm. See Bombazine .] (Zoology) A genus of moths, which includes the silkworm moth. See Silkworm . 
[n] - type genus of the Bombycidae: Chinese silkworm moth
Bombyx A genus of moths, the silkworm moth.
genus Bombyx noun type genus of the Bombycidae: Chinese silkworm moth