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Meaning of preantiseptic

pre•an•ti•sep•tic

Pronunciation: (prē"an-tu-sep'tik), [key]
— adj. Med.
  1. (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.