a combining form appearing in loanwords from Greek, where it meant “same” (homology); on this model, used in the formation of compound words (homomorphic).

Nearby words

  1. homo naledi,
  2. homo rhodesiensis,
  3. homo sapiens,
  4. homo sapiens idaltu,
  5. homo sapiens sapiens,
  6. homobiotin,
  7. homoblastic,
  8. homocarnosine,
  9. homocentric,
  10. homocentricity

Also especially before a vowel, hom-.

Origin of homo-

< Greek, combining form of homós one and the same; akin to Sanskrit sama-; see same

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British Dictionary definitions for homo-


combining form

being the same or likehomologous; homosexual Compare hetero-

Word Origin for homo-

via Latin from Greek, from homos same

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 homo-
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for homo-



Same; like:homotype.

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

Science definitions for homo-


A prefix meaning “same,” as in homogamous, having the same kind of flower.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.