'Viperous' definitions:

Definition of 'Viperous'

From: GCIDE
  • Viperous \Vi"per*ous\, a. Having the qualities of a viper; malignant; venomous; as, a viperous tongue. "This viperous slander." --Shak. -- {Vi"per*ous*ly}, adv. [1913 Webster]