/ Dictionary / Index P preantiseptic: Meaning and Definition of Find definitions for: pre•an•ti•sep•tic Pronunciation: (prē"an-tu-sep'tik), [key] — adj. Med. (esp. of surgery) noting that period of time before the adoption of the principles of antisepsis (about 1867). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. preanesthetic preappoint Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language