noun, plural pe·nis·es, pe·nes [pee-neez] /ˈpi niz/. Anatomy, Zoology.
- the male organ of copulation and, in mammals, of urinary excretion.
- of or relating to the penis
noun plural -nises or -nes (-niːz)
- the male organ of copulation in higher vertebrates, also used for urine excretion in many mammals
n.1670s, perhaps from French pénis or directly from Latin penis “penis,” earlier “tail,” from PIE *pes-/*pesos- “penis” (cf. Sanskrit pasas-, Greek peos, posthe “penis,” probably also Old English fæsl “progeny, offspring,” Old Norse fösull, German Fasel “young of animals, brood”). The proper plural is penes. The adjective is penial. In psychological writing, penis envy is attested from 1924. adj.
- Of or relating to the penis.
n. pl. pe•nis•es
- The male organ of copulation and of urinary excretion, formed by three columns of erectile tissue, two arranged laterally on the dorsum and one medianly below; the extremity is formed by an expansion of the corpus spongiosum, covered by a free fold of skin.
Plural penises penes (pē′nēz)
- The male reproductive organ of mammals and some reptiles and birds. In mammals, the penis contains the urethra, which carries urine from the bladder and releases sperm during reproduction.
- A similar organ found in the males of some invertebrate animals.
The organ of the male reproductive system through which semen passes out of the body during sexual intercourse. The penis is also an organ of urination.