A substance that tends to reduce the surface tension of a liquid in which it is dissolved (took that right from dictionary.com)
A millipede has 750 legs! :)
The term being describe above is the hormonal method in which it prevents the egg from reaching the ovaries to prevent the women from being pregnant during intercourse. There are different types of hormonal methods being used, and it does not only prevent eggs in reaching ovaries but it prevents also sperm in reaching the uterus.
