n. 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. zy·goti·cal·ly adv. |
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