köken: From the biblical name Onan: In the Book of Genesis, Onan, son of Judah, in fulfillment of the laws of levirate marriage was to impregnate his brother Er's widow, Tamar, in order to raise offspring from the union in his brother's name. In order to avoid raising descendants for his late brother, however, Onan spilled his semen on the ground when he went in to his brother's wife, so that he would…
köken: From the New Latin onania (“onanism”), after the biblical Onan, son of Judah who "spilled his semen on the ground" (Genesis 38:9). First attested in 1792.