[hem-i-zahy-goht, -zig-oht]

noun Genetics.

an individual having only one of a given pair of genes.

Nearby words

  1. hemiterpene,
  2. hemithorax,
  3. hemitrope,
  4. hemivertebra,
  5. hemizygosity,
  6. hemizygotic,
  7. hemizygous,
  8. hemline,
  9. hemlock,
  10. hemlock looper

Origin of hemizygote

First recorded in 1930–35; hemi- + zygote

Related formshem·i·zy·gous [hem-i-zahy-guh s] /ˌhɛm ɪˈzaɪ gəs/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for hemizygous



genetics (of a chromosome or gene) not having a homologue; not paired in a diploid cell
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

Medicine definitions for hemizygous




Having unpaired genes in an otherwise diploid cell.




An individual that is hemizygous with respect to one or more specified genes.

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