Sperm (noun)

1. The male reproductive cell, which is typically motile and fertilizes an egg in sexual reproduction.
2. The milky fluid containing spermatozoa that is ejaculated from the male reproductive organs.

Origin:

Late middle english: from latin spermato- (combining form of sperma, sperm- "seed").

Examples:

1. The sperm fertilize the egg in the process of reproduction.
2. The sperm count was low in his semen.
3. The sperm whale is so named because of the large amount of spermaceti oil in its head.
4. The sperm is produced in the testicles.
5. The sperm are released during ejaculation.