A B vitamin that is used to treat pernicious anemia

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 ...

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

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.