The penis is the male sex organ.
Penis or PENIS may also refer to:
- Proton-enhanced nuclear induction spectroscopy
- Penis Park (Haesindang Park), on the east coast of South Korea
- Penis Song, by Monty Python
Biology
- Penis fish (disambiguation)
- Urechis caupo, a species of spoon worm in North America
- Urechis unicinctus, a species of spoon worm in East Asia
- Penis plant, several plants
- Penis snake (Atretochoana)
- Penis worm (Priapulida)