Search Result for "vitamin a":
Wordnet 3.0

NOUN (1)

1. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes;
[syn: vitamin A, antiophthalmic factor, axerophthol, A]


The Collaborative International Dictionary of English v.0.48:

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 function as vitamin A. Called also vitamin A, vitamin A1 and vitamin A alcohol. See vitamin A1. [PJC]
The Collaborative International Dictionary of English v.0.48:

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 v.0.48:

vitamin A \vitamin A\ n. any of several related fat-soluble vitamins (such as retinol) essential for normal vision; it also prevents night blindness or inflammation or dryness of the eyes. Syn: antiophthalmic factor, axerophthol. [WordNet 1.5]
The Collaborative International Dictionary of English v.0.48:

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 v.0.48:

axerophthol \axerophthol\ n. 1. a vitamin essential for normal vision (C20H30O); it prevents night blindness or inflammation or dryness of the eyes; same as vitamin A. One U.S.P. unit of vitamin A is equivalent to 0.30 micrograms of pure vitamin A alcohol. Syn: vitamin A; vitamin A alcohol; antiophthalmic factor; biosterol; retinol; A. [WordNet 1.5 +PJC]
WordNet (r) 3.0 (2006):

vitamin A n 1: any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes [syn: vitamin A, antiophthalmic factor, axerophthol, A]