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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

matter go
that which has mass and occupies space

substance go
a particular kind or species of matter with uniform properties

inhibitor go
a substance that retards or stops an activity

antioxidant go
substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides

carotenoid go
any of a class of highly unsaturated yellow to red pigments occurring in plants and animals

zeaxanthin
yellow carotenoid (isomeric with lutein and occurs widely with it) that is the main pigment in yellow Indian corn

noun.substance

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