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

noun.substance

7 Subcategories

glutathione peroxidase go
an enzyme in the body that is a powerful scavenger of free radicals
selenium, Se, atomic number 34 go
a toxic nonmetallic element related to sulfur and tellurium
carotenoid go
any of a class of highly unsaturated yellow to red pigments occurring in plants and animals
rust inhibitor go
antioxidant that inhibits the formation of rust
beta-naphthol go
an isomer of naphthol used in rubber as an antioxidant
E, vitamin E, tocopherol go
a fat-soluble vitamin that is essential for normal reproduction
C, vitamin C, ascorbic acid go
a vitamin found in fresh fruits (especially citrus fruits) and vegetables