the male reproductive cell; the male gamete
"a sperm is mostly a nucleus surrounded by little other cellular material"
The reproductive cell or gamete of the male; a spermatozoon.
"The swimmer's speed is essential for the sperm to reach and fertilize the egg."
In plain English: Sperm are tiny cells made by males that can join with an egg to create new life.
"The doctor explained that sperm are tiny cells produced by males for reproduction."
Usage: Sperm refers specifically to the microscopic male reproductive cells required for fertilization, distinct from semen which is the fluid that carries them. Use this term when discussing biological reproduction rather than colloquially referring to bodily fluids in general.
To ejaculate.
"The male frog releases sperm into the water to fertilize the eggs."
The word sperm comes from the Latin sperma, which was borrowed into Middle English as sperme. It originally meant "seed" in Ancient Greek before taking on its specific biological sense of male reproductive fluid.