chromophore

Noun

chro=mo=phore

CIDE DICTIONARY

chromophore, n. [Gr. color + fe`rein to bear.].

Any chemical group or residue (as NO2; N2; or O2) which imparts some decided color to the compound of which it is an ingredient. [1913 Webster]

For further exploring for "chromophore" in Webster Dictionary Online

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TIP #04: Try using range (OT and NT) to better focus your searches. [ALL]