polyunsaturation
/ˌpɒlɪʌnˌsatʃʊˈreɪʃn/ /ˌpɒlɪʌnˌsatjʊˈreɪʃn/Chemistry
noun
The property of being polyunsaturated; the extent of this; the presence of a number of carbon–carbon double or triple bonds in a compound.
Origin
1950s; earliest use found in Journal of the American Chemical Society. From poly- + unsaturation, after polyunsaturated.