Definition of cyanocobalamin in English:


Pronunciation /ˌsīənōˌkōˈbaləmən/ /ˌsaɪənoʊˌkoʊˈbæləmən/ /ˈˌsīənōˌkōˈbaləmēn/ /ˈˌsaɪənoʊˌkoʊˈbæləmin/


  • A vitamin found in foods of animal origin such as liver, fish, and eggs, a deficiency of which can cause pernicious anemia. It contains a cyanide group bonded to the central cobalt atom of a cobalamin molecule.

    Also called "vitamin B12" (see vitamin B)

    ‘The B-complex vitamins are actually a group of eight vitamins, which include thiamine, riboflavin, niacin, pyridoxine, folic acid, cyanocobalamin, pantothenic acid and biotin.’
    • ‘At the time of this writing, cyanocobalamin is a widely available form of injectable vitamin B 12, whereas hydroxocobalamin can be obtained only through a compounding pharmacist.’
    • ‘A synthetic form, called cyanocobalamin, is used to fortify foods and make dietary supplements in the United States.’
    • ‘A deficiency of any of the following B-vitamins: folio acid, cyanocobalamin or pyridoxine can cause an increase in blood levels of homocysteine.’
    • ‘The actual increase in cobalt could be entirely attributed to the cobalt content of the cyanocobalamin that was added to the infusion.’


1950s from cyanogen and cobalamin(blend of cobalt and vitamin).