from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The fusion of two gametes in fertilization.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The fusion of two gametes to form a zygote.
from The Century Dictionary and Cyclopedia
- n. Natural and fertile interbreeding.
- n. The fertilization of the egg considered as a process of cellular or nuclear fusion.
From syn- + -gamy (Wiktionary)