Definitions

1. adjective

Having a strong and unpleasant bite or tendency to bite; or having a sharp and biting quality in one’s words or actions.

“The mordacious remarks from the politician sparked outrage among the public.”

2. noun

A person who bites or nips at something or someone, especially in a sharp or unpleasant way.

“The mordacious kitten was constantly biting at its owner’s hands.”