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

Medical 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.

Scientific 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.