adj. also a·zy·gous (-gəs) Not one of a pair, as a vein or muscle; occurring singly. n. An unpaired anatomical structure. [Greek : a-, a- + -zugos, yoked (from zugon, yoke, pair; see yeug- in the Appendix of Indo-European roots).] |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.