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bacillus

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bacillus/bəˈsɪləs/noun
pluralbacilli/-ˈsɪˌlaɪ//bəˈsɪˌlaɪ/
bacillus
/bəˈsɪləs/
noun
pluralbacilli/-ˈsɪˌlaɪ//bəˈsɪˌlaɪ/
Learner's definition of BACILLUS  
[count]technical
: a straight rod-shaped bacterium that requires oxygen for growth
also  : a bacterium that causes disease
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