/ Dictionary / Index P preaseptic: Meaning and Definition of Find definitions for: pre•a•sep•tic Pronunciation: (prē"u-sep'tik), [key] — adj. Med. pertaining to the period before the use of aseptic practices in surgery. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prearrange preatomic 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