a. Obs. rare. [f. VIPER + -IOUS. Cf. VIPEREOUS a.] Viperous, venomous. Hence † Viperiously adv. Obs.–1
c. 1520. Treat. Galaunt (1860), 12. If ye beholde the galauntes progenye vyperyous That out of France be fledde.
1538. St. Papers Hen. VIII. (1834), III. 2. He made there … a comment on the saide letter,… with souch a stomake, as I thinke the three mouthed Cerberous of Hell coulde not have uttered it more viperiously.
a. 1670. Hacket, Abp. Williams, I. (1692), 92. Our viperious countrymen, the English Jesuits in France,… retorted that argument upon us.
