[ koh-dom-uh-nuhnt ]

  1. Ecology. being one of two or more species that are equally dominant in a biotic community: a forest in which oak and hickory are codominant.

  2. Genetics. of or relating to two different alleles that are fully expressed in a heterozygous individual.

Origin of codominant

First recorded in 1895–1900; co- + dominant

Other words from codominant

  • co·dom·i·nance, noun

Words Nearby codominant Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use codominant in a sentence

British Dictionary definitions for codominant


/ (kəʊˈdɒmɪnənt) /

  1. genetics (of genes) having both alleles expressed equally in the phenotype of the organism

Derived forms of codominant

  • codominance, noun

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 codominant


[ kō-dŏmə-nənt ]

  1. Relating to two alleles of a gene pair in a heterozygote that are both fully expressed. When alleles for both white and red are present in a carnation, for example, the result is a pink carnation since both alleles are codominant.

  2. Being one of two or more of the most common or important species in an ecological community. Like a dominant species, codominant species often influence the presence and type of other species in the community.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.