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[lak-toh-buh-sil-uh s] /ˌlæk toʊ bəˈsɪl əs/
noun, plural lactobacilli
[lak-toh-buh-sil-ahy] /ˌlæk toʊ bəˈsɪl aɪ/ (Show IPA).
any long, slender, rod-shaped, anaerobic bacterium of the genus Lactobacillus, that produces large amounts of lactic acid in the fermentation of carbohydrates, especially in milk.
Origin of lactobacillus
< New Latin (1901); see lacto-, bacillus Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for lactobacillus
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Historical Examples
  • Koumiss bacterium is related to the lactobacillus of various other fermented milks, and is similar to Bac.

    The Bacillus of Long Life Loudon Douglas
British Dictionary definitions for lactobacillus


noun (pl) -li (-laɪ)
any Gram-positive rod-shaped bacterium of the genus Lactobacillus, which ferments carbohydrates to lactic acid, for example in the souring of milk: family Lactobacillaceae
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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lactobacillus in Medicine

lactobacillus lac·to·ba·cil·lus (lāk'tō-bə-sĭl'əs)
Any of various rod-shaped, nonmotile, aerobic bacteria of the genus Lactobacillus that ferment lactic acid from sugars and are the causative agents in the souring of milk.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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