Obs. rare–1. [Formation irregular; perh. after It. atheo (cf. Draco, Draconism); see quot. 1568 in ATHEIST 1.] = ATHEISM.
c. 1534. Pol. Verg. Eng. Hist. (1846), I. 165. Godd would not longe suffer this impietie, or rather atheonisme.
