Definition of cyanocobalamin in English:

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Pronunciation: /ˌsʌɪənə(ʊ)kəˈbaləmɪn/


[mass noun]
A vitamin derived from foods of animal origin such as liver, fish, and eggs, a deficiency of which can cause pernicious anaemia. It contains a cyanide group bonded to the central cobalt atom of a cobalamin molecule. Also called vitamin B12.
Example sentences
  • 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.


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

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