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The Collaborative International Dictionary of English v.0.48 (gcide)

bacilli \bacilli\ n.
plural of {bacillus}; usually designating aerobic rod-shaped
spore-producing bacteria; they often occur in chainlike
formations.

Syn: bacillus
[WordNet 1.5]


Bacillus \Ba*cil"lus\, n.; pl. {Bacilli}. [NL., for L. bacillum.
See {Bacillari[ae]}.] (Biol.)
A variety of bacterium; a microscopic, rod-shaped vegetable
organism.
[1913 Webster]