/ Thesaurus / R Synonyms of radius of curvature Find synonyms for: Noun1. radius of curvature, radius, rusage: the radius of the circle of curvature; the absolute value of the reciprocal of the curvature of a curve at a given pointWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language