/ Dictionary / Index G glyoxylic acid: Meaning and Definition of Find definitions for: gly'ox•yl'ic ac'id Pronunciation: (glī'ok-sil'ik, glī"-), [key] a water-soluble crystalline compound, CHO, that is an intermediate in photorespiration in plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. glyoxylate glyph Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language