Dictionary.com

homology

[ huh-mol-uh-jee, hoh- ]
/ həˈmɒl ə dʒi, hoʊ- /
Save This Word!

noun, plural ho·mol·o·gies.

the state of being homologous; homologous relation or correspondence.
Biology.
  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.

QUIZZES

QUIZ YOURSELF ON “THEIR,” “THERE,” AND “THEY’RE”

Are you aware how often people swap around “their,” “there,” and “they’re”? Prove you have more than a fair grasp over these commonly confused words.
Question 1 of 7
Which one of these commonly confused words can act as an adverb or a pronoun?

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. 2021

Example sentences from the Web for homology

  • The modern definition of homology is quite involved, but it is roughly a means of associating to each shape a certain mathematical object.

    Topology 101: The Hole Truth|David S. Richeson|January 26, 2021|Quanta Magazine
  • 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

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

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.
Tired of Typos? Get Help Now!