plural noun, singular my·co·bac·te·ri·um [mahy-koh-bak-teer-ee-uh m] /ˌmaɪ koʊ bækˈtɪər i əm/. Bacteriology.

rod-shaped aerobic bacteria of the genus Mycobacterium, certain species of which, as M. tuberculosis, are pathogenic for humans and animals.

Nearby words

  1. mycetoma,
  2. mycetophagous,
  3. mycetozoan,
  4. mycid,
  5. myco-,
  6. mycobacteriosis,
  7. mycobacterium,
  8. mycobacterium balnei,
  9. mycobacterium kansasii,
  10. mycobacterium leprae

Origin of mycobacteria

< New Latin (1896); see myco-, bacteria Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for mycobacterium


noun plural -ria (-rɪə)

any of the rod-shaped Gram-positive bacteria of the genus Mycobacterium, some of which cause human diseases, such as tuberculosis and leprosy
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

Medicine definitions for mycobacterium




Any of various slender rod-shaped aerobic bacteria of the genus Mycobacterium, which includes the bacteria that cause tuberculosis and leprosy.



A genus of aerobic, nonmotile bacteria containing gram-positive rods and including both parasitic and saprophytic species.

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