Definition of polyunsaturated fat noun from the Oxford Advanced Learner's Dictionary

 

polyunsaturated fat

 noun
noun
BrE BrE//ˌpɒliʌnˌsætʃəreɪtɪd ˈfæt//
 
; NAmE NAmE//ˌpɑːliʌnˌsætʃəreɪtɪd ˈfæt//
 
[countable, uncountable]
 
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a type of fat found, for example, in seeds and vegetable oils, which does not encourage the harmful development of cholesterol foods that are high in polyunsaturated fats see also monounsaturated fat, saturated fat, trans-fatty acid, unsaturated fat
See the Oxford Advanced American Dictionary entry: polyunsaturated fat