vitamin A1
vitamin A1 vitamin A1 n. retinol ({C20H30O}), one of the substances also called {vitamin A}. It is also called more specifically {vitamin A alcohol}. It is a required factor for human nutrition. The USP unit of activity is equal to 0.30 micrograms of retinol.

Syn: retinol. [WordNet 1.5 +PJC]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • vitamin A1 — ā wən n VITAMIN A (a) * * * retinol …   Medical dictionary

  • vitamin A1 — Retinol Ret i*nol, n. [Gr. ??? resin + L. oleum oil.] 1. (Chem.) A hydrocarbon oil {C32H16}, obtained by the distillation of resin, used as a solvent, as an antiseptic, and in printer s ink. [1913 Webster +PJC] 2. One of the compounds which… …   The Collaborative International Dictionary of English

  • vitamin A1 — noun an unsaturated alcohol that occurs in marine fish liver oils and is synthesized biologically from carotene • Syn: ↑retinol • Hypernyms: ↑vitamin A, ↑antiophthalmic factor, ↑axerophthol, ↑A * * * noun see …   Useful english dictionary

  • Vitamin A — is retinol. Carotene compounds (found, for example, in egg yolk, butter and cream) are gradually converted by the body to vitamin A (retinol). A form of vitamin A called retinal is responsible for transmitting light sensation in the retina of the …   Medical dictionary

  • vitamin A — vitamin A1 vitamin A1 n. retinol ({C20H30O}), one of the substances also called {vitamin A}. It is also called more specifically {vitamin A alcohol}. It is a required factor for human nutrition. The USP unit of activity is equal to 0.30… …   The Collaborative International Dictionary of English

  • vitamin A alcohol — vitamin A1 vitamin A1 n. retinol ({C20H30O}), one of the substances also called {vitamin A}. It is also called more specifically {vitamin A alcohol}. It is a required factor for human nutrition. The USP unit of activity is equal to 0.30… …   The Collaborative International Dictionary of English

  • vitamin A — vitamin A2 vitamin A2 n. dehydroretinol ({C20H28O}), one of the substances also called {vitamin A}. It has about 40% of the bioactivity of vitamin A1. Syn: dehydroretinol. [WordNet 1.5 +PJC] …   The Collaborative International Dictionary of English

  • vitamin A2 — n. dehydroretinol ({C20H28O}), one of the substances also called {vitamin A}. It has about 40% of the bioactivity of vitamin A1. Syn: dehydroretinol. [WordNet 1.5 +PJC] …   The Collaborative International Dictionary of English

  • vitamin A — n. 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… …   English World dictionary

  • vitamin A{}2{} — vitamin A2 n. A golden yellow oil, C20H28O, occurring chiefly in the livers of freshwater fish and having about 40 percent of the biological activity of vitamin A1. * * * …   Universalium

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