penis

1. (anatomy) The male erectile reproductive organ used for sexual intercourse that in the human male and other placental mammals is also used for urination; the tubular portion of the external male genitalia (excluding the scrotum).Examples: "The female clitoris is homologous to the male penis."; "See, the problem is that God gives men a brain and a penis, and only enough blood to run one at a time."; "The penis is the perfectly obvious and natural symbol of instantaneous time."

2. (zoology) A similar erectile sexual organ present in the cloacas of male amniotes.