'vitamin B12' definitions:

Definition of 'vitamin B12'

From: WordNet
noun
A B vitamin that is used to treat pernicious anemia [syn: vitamin B12, cobalamin, cyanocobalamin, antipernicious anemia factor]

Definition of 'vitamin B12'

From: GCIDE
  • vitamin B12 \vitamin B12\ n. a B vitamin that is used to treat pernicious anemia.
  • Syn: cobalamin, cyanocobalamin. [WordNet 1.5]