American Heritage® Dictionary of the English Language, Fourth Edition
- n. See vitamin A.
Century Dictionary and Cyclopedia
- n. A liquid diterpene, C20H32, which is found in copaiba and is also formed by the distillation of rosin. It is occasionally used as a solvent in pharmacy, and as an ointment or liniment.
- n. A fat-soluble carotenoid vitamin (vitamin A), present in fish oils and green vegetables, essential to normal vision and to bone development.
GNU Webster's 1913
- n. (Chem.) A hydrocarbon oil C32H16, obtained by the distillation of resin, -- used as a solvent, as an antiseptic, and in printer's ink.
- n. One of the compounds which function as vitamin A. Called also
vitamin A, vitamin A1and vitamin A alcohol. See vitamin A1.
- n. an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene
“I think most of us just finished eating them for Thanksgiving and sweet potatoes have so much vitamin A the orange color as you can see is converted to beta-carotene that's converted to retinol, which is vitamin A in your body and so that helps fight, boost your immune system and fight off colds and flu.”
“Vitamin A: Also known as retinol, vitamin A only occurs in animal foods, but fruit and vegetables contain carotenoids, which are converted to vitamin A by our bodies.”
“The immediate receptor of the photon is a derivative of vitamin A, termed retinol.”
“An enzyme encoded by RPE65 helps break down a derivative of vitamin A called retinol into a substance that photoreceptors need to detect light and send signals to the brain.”
“Unlike "retinol," a compound found in many over-the-counter products, retinoic acid must be prescribed.”
“Non-polar molecules, such as retinol or fatty acids are poorly soluble in water.”
“Polyhydroxy Acids and NeoGlucosamine, with other highly effective ingredients such as retinol, peptides and potent antioxidants -- to target the multiple mechanisms of skin aging.”
“The promise: Youth-boosting skin-care ingredients such as retinol, peptides, and antioxidants are popping up in foundations, lipsticks, and blushes, with claims they'll help minimize wrinkles and brown spots by improving their”
“It's Anti-Aging Makeup The promise: Youth-boosting skin-care ingredients such as retinol, peptides, and antioxidants are popping up in foundations, lipsticks, and blushes, with claims they'll”
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