Definitions

from the GNU version of the Collaborative International Dictionary of English.

  • noun any of several related fat-soluble vitamins (such as retinol) essential for normal vision; it also prevents night blindness or inflammation or dryness of the eyes.

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

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