antioxidant

[ an-tee-ok-si-duhnt, an-tahy- ]

noun

1. Chemistry. any substance that inhibits oxidation, as a substance that inhibits oxidative deterioration of gasoline, rubbers, plastics, soaps, etc.
2. Biochemistry. an enzyme or other organic substance, as vitamin E or beta carotene, that is capable of counteracting the damaging effects of oxidation in animal tissues.

adjective

1. Chemistry. of or relating to an antioxidant.

antioxidant

/ ˌæntɪˈɒksɪdənt /

noun

1. any substance that retards deterioration by oxidation, esp of fats, oils, foods, petroleum products, or rubber
2. biology a substance, such as vitamin C, vitamin E, or beta carotene, that counteracts the damaging effects of oxidation in a living organism

antioxidant

/ ăn′tē-ŏk′sĭ-dənt,ăn′tī- /

1. A chemical compound or substance that inhibits oxidation. Certain vitamins, such as vitamin E, are antioxidants and may protect body cells from damage caused by the oxidative effects of free radicals.

Word History and Origins

Origin of antioxidant¹

First recorded in 1925–30; anti- + oxidant ( oxid(ize) + -ant )

Example Sentences

There's some evidence chlorophyll may have health benefits – including anti-inflammatory, anti-cancer and anti-obesity effects – due to its antioxidant properties.

From Salon

Aside from increasing alertness, caffeine has also demonstrated antioxidant effects and some protection against a range of chronic and neurodegenerative diseases.

From Salon

Seaweed is valued for its antioxidant properties, which helps protect cells against free radical damage.

From Salon

Bladder, toothed and spiral wracks often have notably higher antioxidant contents than many other seaweeds.

From Salon

Part of this practice stems from the long-held myth that spermine — an antioxidant and anti-inflammatory agent found in sperm and cells in the human body — is good for the skin.

From Salon