- A genus of parasitic protozoan flagellates that cause trichomoniasis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- Any of various flagellated protozoans of the genus Trichomonas that are parasitic and inhabit the digestive and genitourinary tract of the host. Trichomonas vaginalis is a common cause of vaginal infections in humans.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.