hemizygous
adjective
hemi·zy·gous
ˌhe-mi-ˈzī-gəs 
: having or characterized by one or more genes (as in a genetic deficiency or in an X chromosome paired with a Y chromosome) that have no allelic counterparts
Cite this Entry
“Hemizygous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hemizygous. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
hemizygous
adjective
hemi·zy·gous
-ˈzī-gəs
: having or characterized by one or more genes (as in a genetic deficiency or in an X chromosome paired with a Y chromosome) that have no allelic counterparts
Love words? Need even more definitions?
Merriam-Webster unabridged
Share