polyunsaturatedPronunciation: /ˌpɒlɪʌnˈsatʃʊreɪtɪd, -ˈsatjʊreɪtɪd/Translate polyunsaturated | into German Definition of polyunsaturated adjective Chemistry (of an organic compound, especially a fat or oil molecule) containing several double or triple bonds between carbon atoms. polyunsaturated in other Oxford dictionaries Definition of polyunsaturated in the US English dictionary