/ Thesaurus / R Synonyms of refractory period Find synonyms for: Noun1. refractory period, biological timeusage: (neurology) the time after a neuron fires or a muscle fiber contracts during which a stimulus will not evoke a responseWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language