a hydrocarbon that contains one or more benzene rings that are characteristic of the benzene series of organic compounds

(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

any substance whose presence in plant or animal tissues produces a characteristic color

any of a class of flavonoids that have the 3-hydroxyflavone backbone.

a vitamin that maintains the resistance of cell and capillary walls to permeation