different between polyunsaturated vs phytoene

English

From poly- +? unsaturated.

polyunsaturated (not comparable)

(chemistry) Of or relating to long chain organic compounds that have multiple double bonds; polyunsaturated fatty acids are essential to human nutrition.
(nutrition, of a fat or oil) Having a chemical structure that does not easily change into cholesterol (a substance containing a lot of fat though to be an important cause of heart disease).
Synonym: unhealthy

From phyto- +? -ene.

phytoene (uncountable)

(organic chemistry) An acyclic polyunsaturated isoprenoid hydrocarbon that is the precursor of the biosynthesis of carotenoid pigments

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