1. The cell formed by the union of two gametes, especially a fertilized ovum before cleavage.
2. The organism that develops from a zygote.
[From Greek zugōtos, yoked, from zugoun, to yoke; see yeug- in the Appendix of Indo-European roots.]
zy·gotic (-gŏtĭk) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.