/ Thesaurus / I Synonyms of identity matrix Find synonyms for: Noun1. identity matrix, unit matrix, scalar matrixusage: a scalar matrix in which all of the diagonal elements are unityWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language