nonoxynol-9: Meaning and Definition of

non•ox•y•nol-9

Pronunciation: (no-nok'su-nôl"nīn', -nol"-), [key]
— n. Pharm.
  1. the active ingredient of spermicides.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.