Definify.com

Webster 1913 Edition

Adj.

Having the qualities of a viper; malignant; venomous;

as, a

viperous

tongue

“This viperous slander.”

Shak.

–

Vi′per-ous-ly

adv.

Adj.

[L. viperus.] Having the qualities of a viper; malignant; venomous; as a viperous tongue.

viperous ‎(comparative more viperous, superlative most viperous)