A B vitamin that is used to treat pernicious anemia

Wiktionary Word definitions in Wiktionary
n. (context organic compound English) Any of several forms of vitamin B12 depending on the upper axial ligand of the cobalt ion.

WordNet Word definitions in WordNet
n. a B vitamin that is used to treat pernicious anemia [syn: vitamin B12 , cyanocobalamin , antipernicious anemia factor ]

Wikipedia Word definitions in Wikipedia
Cobalamin may refer to several chemical forms of vitamin B , depending on the upper axial ligand of the cobalt ion . These are: Cyanocobalamin (R = –CN) Hydroxocobalamin (R = –OH) Methylcobalamin (R = –CH), an active form of vitamin B Adenosylcobalamin ...