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VITAMIN A
I. (noun)
Sense 1
Meaning:
Any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
Synonyms:
A; antiophthalmic factor; axerophthol; vitamin A
Classified under:
Hypernyms ("vitamin A" is a kind of...):
fat-soluble vitamin (any vitamin that is soluble in fats)
Hyponyms (each of the following is a kind of "vitamin A"):
retinol; vitamin A1 (an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene)
dehydroretinol; vitamin A2 (a viscous alcohol that is less active in mammals than is vitamin A1)
Context examples:
A synthetic phenylretinamide analogue of retinol (vitamin A) with potential antineoplastic and chemopreventive activities.
(Carboxyphenyl Retinamide, NCI Thesaurus)
An inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder.
(Night Blindness, NCI Thesaurus)
An orally-active synthetic phenylretinamide analogue of retinol (vitamin A) with potential antineoplastic and chemopreventive activities.
(Fenretinide, NCI Thesaurus)
Some carotenoids are changed into vitamin A in the body and some are being studied in the prevention of cancer.
(Carotenoid, NCI Dictionary)
Around 500 million people, or more than two-thirds of the Indian population, are now affected by deficiencies in protein and micronutrients such as iron, zinc, and vitamin A.
(Course grains better than rice for health, environment, SciDev.Net)
The body can make vitamin A from beta carotene.
(Beta carotene, NCI Dictionary)
He said it had been estimated that 650,000-700,000 children worldwide die from pro-vitamin A deficiency each year with a further several hundred thousand going blind.
(Golden Bananas High in Pro-Vitamin A Developed, The Titi Tudorancea Bulletin)
But Murray was careful to stress her study did not establish a cause-and-effect relationship between vitamin A deficiency and development of tuberculosis.
(Vitamin A Supplement May Thwart Tuberculosis Infection, Jessica Berman/VOA)
Getting enough vitamin A, vitamin K, magnesium, zinc and copper were all associated with a lower risk of dying early, the researchers found — but only when those nutrients came from food.
(Healthy Diet Can't Be Replaced by Vitamins, Supplements, The Titi Tudorancea Bulletin)
The herb contains the alkaloids stachydrine and leonurinine, glycosides, diterpinoids, flavonoids, tannins, volatile oils, and vitamin A.
(Motherwort, NCI Thesaurus)
