polyunsaturated fat

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a fat or oil, almost exclusively from vegetable sources, containing a high proportion of polyunsaturated fatty acids; will typically be liquid at room temperature

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a class of fats having long carbon chains with many double bonds unsaturated with hydrogen atoms; used in some margarines; supposedly associated with low blood cholesterol