spermatozoon

noun

1. A reproductive cell or gamete of a male, carried in semen, that fertilizes an ovum to produce a zygote.

   “But let us suppose [...] that one hardy or lucky spermatozoon has reached the waiting egg.”

   “A sperm, or spermatozoa, is the microscopic male reproductive cell. Sperms are made up of oval-shaped heads and long tails that they use for mobility.”