[ huh-mol-uh-jee, hoh- ]
/ həˈmɒl ə dʒi, hoʊ- /

noun, plural ho·mol·o·gies.

the state of being homologous; homologous relation or correspondence.
  1. a fundamental similarity based on common descent.
  2. a structural similarity of two segments of one animal based on a common developmental origin.
Chemistry. the similarity of organic compounds of a series in which each member differs from its adjacent compounds by a fixed increment, as by CH2.
Mathematics. a classification of figures according to certain topological properties.


How Hip Is Your Lingo? Take Our Slang Quiz!
If you aren’t already skilled in slang, then this quiz can get you up to speed in no time!
Question 1 of 11
OK Boomer can be perceived as pejorative, but it is mostly considered to be _____

Origin of homology

1650–60; < Greek homología agreement, equivalent to homólog(os) homologous + -ia -y3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for homology

  • Homology is still determined by position, by connections, in the embryo as in the adult.

    Form and Function|E. S. (Edward Stuart) Russell

British Dictionary definitions for homology

/ (həʊˈmɒlədʒɪ) /

noun plural -gies

the condition of being homologous
chem the similarities in chemical behaviour shown by members of a homologous series
zoology the measurable likenesses between animals, as used in grouping them according to the theory of cladistics

Word Origin for homology

C17: from Greek homologia agreement, from homologos agreeing; see homologate
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

Scientific definitions for homology

[ hə-mŏlə-jē ]

A homologous relationship or correspondence.
The relation of the chemical elements of a periodic family or group.
The relation of the organic compounds forming a homologous series.
A topological classification of configurations into distinct types that imposes an algebraic structure or hierarchy on families of geometric figures.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.