ˈpēnə̇s noun
( plural pe·nes -ēˌnēz ; or penises )
Etymology: Latin, penis, tail; akin to Greek peos, posthē penis, Sanskrit pasas penis, Old English fæsl fetus, offspring, Old High German faselt penis, fasel fetus, offspring, Old Norse fösull
1. : the copulatory organ of the male of a higher vertebrate animal that in mammals usually provides also the channel by which urine leaves the body and is typically a cylindrical organ made up of a broad root by which it is suspended from the pubic arch, an elongated cylindrical body consisting chiefly of a pair of large lateral corpora cavernosa and a smaller ventromedial corpus cavernosum containing the urethra, and a terminal glans enclosing the ends of the corpora cavernosa, covered by mucous membrane, and sheathed by a foreskin continuous with the skin covering the body of the organ
2. : any of various male copulatory organs that are not homologous with the vertebrate penis (as the aedeagus of an insect or the copulatory setae of some worms)