| NOUN | substance | vitamin A, antiophthalmic factor, axerophthol, A | any of several fat-soluble vitamins essential for normal vision |
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| Meaning | Any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes. | |
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| Synonyms | antiophthalmic factor, axerophthol, A | |
| Narrower | vitamin A1, retinol | An unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene |
| vitamin A2, dehydroretinol | A viscous alcohol that is less active in mammals than is vitamin A1 | |
| Broader | fat-soluble vitamin | Any vitamin that is soluble in fats |
| Spanish | retinol, vitamina A | |
| Catalan | vitamina A | |
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