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 (sī′ə-nō′kō-băl′ə-mĭn, sī-ăn′ō-)


(ˌsaɪənəʊkəʊˈbæləmɪn) or


(Biochemistry) a complex red crystalline compound, containing cyanide and cobalt and occurring in liver: lack of it in the tissues leads to pernicious anaemia. Formula: C63H88O14N14PCo. Also: vitamin B12
[C20: from cyano- + cobal(t) + (vit)amin]

vitamin B1


vitamin B2


vitamin B3


vitamin B6


vitamin B12

a complex water-soluble solid, C63H88N14O14PCo, obtained from liver, milk, eggs, fish, oysters, and clams: a deficiency causes pernicious anemia and disorders of the nervous system. Also called cyanocobalamin, cobalamin, extrinsic factor.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cyanocobalamin - a B vitamin that is used to treat pernicious anemiacyanocobalamin - a B vitamin that is used to treat pernicious anemia
B complex, B vitamin, B-complex vitamin, vitamin B, vitamin B complex, B - originally thought to be a single vitamin but now separated into several B vitamins


n. cianocobalamina, vitamina B12 usada en el tratamiento de la anemia perniciosa.


n cianocobalamina, vitamina B12
References in periodicals archive ?
([dagger]) Vitamin mix with the following vitamins (mg or MIU [kg.sup.-1] dry feed): thiamin, 54; riboflavin, 108; pyridoxine, 84; cyanocobalamine, 0.3; niacin, 216; pantothenic acid, 6; biotin, 0.015; folic acid, 18; inositol, 450; stable C, 1500; menadione, 36; tocopherol, 247; carotene, 3.0 MIU; and calciferol, 0.6 MIU.
[H.sub.2]O, 135.8; [C.sub.6]H10Ca[O.sub.6] 327.0; [C.sub.6][H.sub.5][O.sub.7]Fe.5[H.sub.2]O, 29.8; MgS[O.sub.4].7[H.sub.2]O, 132.0; K[H.sub.2]P[O.sub.4] (dibasic), 239.8; Na[H.sub.2]P[O.sub.4].2[H.sub.2]O, 87.2; NaCl, 43.5 (g [kg.sup.-1]); (5) vitamin mix (choline chloride 5000: thiamin HCL 50; riboflavin 200; pyridoxine HCL 50; nicotinic acid 750; calcium pentothenate 500; inositol 2000; biotin 5.0; folic acid 15; ascorbic acid 1000; menadione 40; alpha-tocopheryl acetate 400; cyanocobalamine 0.1 (g [kg.sup.-1]).
Remarkable suppression in Rap biosynthesis was observed with addition of biotin, pyridoxine and cyanocobalamine. The highest inhibition was in case of thiamine-HCl, nicotinic acid and L (+) ascorbic acid.
This is akin to giving cyanocobalamine in a blinded fashion to a group of people with peripheral neuropathy without regard to their cyanocobalamine levels.