from the GNU version of the Collaborative International Dictionary of English.
- noun 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
Sorry, no etymologies found.
Hence vitamin A has received the name of axerophthol.