luteinPronunciation: /ˈluːtɪɪn/Definition of lutein noun [mass noun] Biochemistry a deep yellow pigment of the xanthophyll class, found in the leaves of plants, in egg yolk, and in the corpus luteum. Origin: mid 19th century: from Latin luteum 'yolk of egg' (neuter of luteus 'yellow') + -in1lutein in other Oxford dictionaries Definition of lutein in the US English dictionary
