We don't have any synonyms for penises yet.
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Definition of penises:
(n) :
(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).
(n) :
(zoology) A similar erectile sexual organ present in the cloacas of male amniotes.