noun Ophthalmology.
  1. a chronic, contagious infection of the conjunctiva and cornea, characterized by the formation of granulations and scarring and caused by the bacterium Chlamydia trachomatis.

Origin of trachoma

1685–95; < Greek trā́chōma roughness, equivalent to trāch(ýs) rough + -ōma -oma
Related formstra·chom·a·tous [truh-kom-uh-tuh s, -koh-muh-] /trəˈkɒm ə təs, -ˈkoʊ mə-/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for trachoma

Historical Examples of trachoma

  • All he could conclude was that it was not ophthalmia or trachoma.

    The Leopard Woman

    Stewart Edward White

  • Trachoma, if neglected, not only impairs the health of the eye, but may cause blindness.

    Civics and Health

    William H. Allen

  • When trachoma, the sickness of the eyes, was known as the scourge of the Sahara.

    Black Man's Burden

    Dallas McCord Reynolds

  • Trachoma was eliminated, and no cases of rabies were reported in the 1967-69 period.

  • First they went to another "jungle," one where trachoma was bad.

    Across the Fruited Plain

    Florence Crannell Means

British Dictionary definitions for trachoma


  1. a chronic contagious disease of the eye characterized by inflammation of the conjunctiva and cornea and the formation of scar tissue, caused by infection with the virus-like bacterium Chlamydia trachomatis
Derived Formstrachomatous (trəˈkɒmətəs, -ˈkəʊ-), adjective

Word Origin for trachoma

C17: from New Latin, from Greek trakhōma roughness, from trakhus rough
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

Word Origin and History for trachoma

1690s, from Modern Latin trachoma, from Greek trakhoma "roughness," from trakhys "rough."

Online Etymology Dictionary, © 2010 Douglas Harper

trachoma in Medicine


  1. A contagious disease of the conjunctiva and cornea, caused by the bacterium Chlamydia trachomatis and marked by inflammation, hypertrophy, and formation of granules of adenoid tissue. It is a major cause of blindness in Asia and Africa.contagious granular conjunctivitis Egyptian ophthalmia granular conjunctivitis granular ophthalmia
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

trachoma in Science


  1. A contagious disease of the conjunctiva and cornea, caused by the bacteria Chlamydia trachomatis and characterized by granules of inflammatory tissue. It is a major cause of blindness in Asia and Africa.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.