See monounsaturated in American Heritage Dictionary 4
(mŏnˌō-ŭn-săchˈə-rāˌtĭd)
adjective
Of or relating to an organic compound, especially an oil or fatty acid, containing only one double or triple bond per molecule. Foods containing monounsaturated fatty acids may decrease the amount of LDL cholesterol in the blood and include olive, peanut, canola, and avocado oils.