spermatozoon

Mature spermatozoa are characterized by an head, midpiece and a long tail for locomotion.

Converting these cells into viable spermatozoa could help to save the critically endangered animal from extinction.

The Oklahoma measure defines fertilisation as the "fusion of a human spermatozoon with a human ovum".

Some are revealed to have long, squiggly tails — spermatozoa, perhaps, which resonate against the labial form that Rist designed for the lights.

In Mr. Wiley’s “Napoleon,” from 2005, the Alpine setting has given way to an abstract ground of red and gold brocade, speckled, strange to say, by swimming spermatozoa.