A zygote is the cell that is formed by the union of a sperm (male sex cell) and an ovum (female sex cell). The zygote develops into the embryo as instructed by the genetic material within the unified cell. The unification of a sperm and an ovum is called "fertilization." (see sperm, ovum).
ZYGOTE
Meaning of ZYGOTE in English
English dictionary of medicine. Английский словарь медицины. 2012