Meaning of viperous

vi•per•ous

Pronunciation: (vī'pur-us), [key]
— adj.
  1. of the nature of or resembling a viper: a viperous movement.
  2. of or pertaining to vipers.
  3. characteristic of vipers.
  4. venomous.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.