D defs.my
Entry 1 sense Webster, 1913

Bacillus

/bəs-ĭl'-əs/ · Ba·cil·lus · IPA /bæˈsɪl.əs/
01 n. A variety of bacterium; a microscopic, rod-shaped vegetable organism.
pl. Bacilli
  1. 1.
    A variety of bacterium; a microscopic, rod-shaped vegetable organism.(Biol.)