Checking short cuts using vision aid

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
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. ...

Wiktionary Word definitions in Wiktionary
n. (context vitamin English) Any of several closely related fat-soluble vitamins that are essential for normal vision; retinol.

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

Wikipedia Word definitions in Wikipedia
Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol , retinal , retinoic acid , and several provitamin A carotenoids (most notably beta-carotene ). Vitamin A has multiple functions: it is important for growth and development, ...