Zygote (noun)

A cell formed by the union of two gametes, typically the nucleus of a spermatozoon and an ovum, which develops into an embryo.

Origin:

From greek zygōtos "joined", from zygon "yoke".

Examples:

1. The fertilized egg is called a zygote.
2. The zygote is the first stage of development in the life cycle of a multicellular organism.
3. The zygote undergoes a series of cell divisions that eventually form the embryo.
4. The zygote is formed when the sperm and egg unite during fertilization.
5. The zygote is diploid, it contains half the number of chromosomes from each parent.