- (lit. a little rod), a bacterium, distinguished as being twice as long as it is broad, others being more or less rounded.See BACTERIA.
The Nuttall Encyclopaedia. James Wood. 1907.
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tubercle bacillus — tu′bercle bacil lus n. mcr the bacterium, Mycobacterium tuberculosis, causing tuberculosis • Etymology: 1895–1900 … From formal English to slang