/ Dictionary / Index G glacial acetic acid: Meaning and Definition of Find definitions for: gla'cial ace'tic ac'id Pronunciation: [key] acetic acid of at least 99.5 percent concentration, solidifying at 16.7°C. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. glacial glacial drift Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language