'Refutal' definitions:

Definition of 'refutal'

From: WordNet
noun
The act of determining that something is false [syn: falsification, falsifying, disproof, refutation, refutal]

Definition of 'Refutal'

From: GCIDE
  • Refutal \Re*fut"al\ (r?*f?t"al), n. Act of refuting; refutation. [1913 Webster]