Spermatocide
Any agent that is destructive to spermatozoa (that is, kills sperm). Nonoxynol-9 is the most commonly encountered spermatocide in the United States. (The nonoxynols, technically speaking, are nonionic surfactant [surface active] mixtures that vary in the number of repeating ethoxy groups.) They are much used as detergents, emulsifiers, wetting and defoaming agents, etc. Nonoxynol-9 has 9 repeating ethoxy groups and is the active component of most vaginal foams and creams.
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sper·mato·cid·al (.)spər-.mat-ə-'sīd-əl adj
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sper·ma·to·cide (spər-matґo-sīd″) spermicide.
Medical dictionary.
2011.