'vitamin A2' definitions:

Definition of 'vitamin A2'

(from WordNet)
noun
A viscous alcohol that is less active in mammals than is vitamin A1 [syn: vitamin A2, dehydroretinol]

Definition of 'vitamin A2'

From: GCIDE
  • vitamin A2 \vitamin A2\ n. dehydroretinol (C20H28O), one of the substances also called vitamin A. It has about 40% of the bioactivity of vitamin A1.
  • Syn: dehydroretinol. [WordNet 1.5 +PJC]