The egg of a louse.

A young louse.

(UK, Ireland, slang) A head louse regardless of its age.

(UK, slang) A fool, a nitwit.

A nitpicker.

A minor shortcoming.

A candela per square metre.

Synonym of nat (“logarithmic unit of information”)

(poker) A player with an overly cautious and reactive playing style.

(MLE) To have the modus vivendi of a drug addict, to live the life of a nitty.