[puh-ri-tri-kuh s]
  1. (of bacteria) having a uniform distribution of flagella over the body surface.
  2. (of certain protozoans) having cilia arranged spirally around the mouth.

Origin of peritrichous

1875–80; peri- + -trichous < Greek -trichos -haired; see -tricha, -ous Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for peritrichous

Historical Examples of peritrichous

peritrichous in Medicine


  1. Of, relating to, or having cilia or other appendicular organs projecting from the periphery of a cell.
  2. Peritrichal.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.