Vitamin A Definition

noun
A fat-soluble vitamin or a mixture of vitamins, especially vitamin A1 or a mixture of vitamins A1 and A2 , occurring principally in fish-liver oils, milk, and some yellow and dark green vegetables, and functioning in normal cell growth and development. Vitamin A deficiency can cause damage to epithelial cells, resulting in hardening and roughening of the skin, degeneration of mucous membranes, and night blindness.
American Heritage
A fat-soluble aliphatic alcohol, C20H29OH, found in fish-liver oil, egg yolk, butter, etc. or derived from carotene in carrots and other vegetables: a deficiency of this vitamin results in night blindness, a general susceptibility to infections, and degeneration of epithelial tissue; retinol: it usually occurs in two forms, vitamin A1, having the formula above, and vitamin A2, C20H27OH.
Webster's New World
A golden yellow oil, C20 H28 O, occurring chiefly in the livers of freshwater fish and having about 40 percent of the biological activity of vitamin A1 .
American Heritage

(biochemistry) Any of several closely related fat-soluble vitamins that are essential for normal vision; retinol.

Wiktionary
Synonyms:

Vitamin A Sentence Examples

  • The study itself was not stopped, but the participants were told to stop taking the beta carotene and vitamin A or placebos.

  • They are an excellent source of vitamin A our bodies convert the orange pigment carotene into it.

  • More than 60 percent favored GM foods to help diabetics as well as wheat with vitamin A to combat blindness.

  • For vitamin A the NGO trains villagers to grow and eat papaya, pumpkins, carrots and other yellow vegetables.

  • The cream brings the benefits of vitamin A and jojoba oil, which is the closest oil to our own natural sebum.

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