'vitamin A' definitions:

Definition of 'vitamin A'

(from WordNet)
noun
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]

Definition of 'vitamin A'

From: GCIDE
  • 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]

Definition of 'vitamin A'

From: GCIDE
  • 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]

Definition of 'vitamin A'

From: GCIDE
  • 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]

Definition of 'vitamin A'

From: GCIDE
  • 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]

Words containing 'vitamin A'