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 (thī′ə-mĭn, -mēn′) also thi·a·min (-mĭn)
A vitamin, C12H17ClN4OS, of the vitamin B complex, found in beans, whole grains, meat, and yeast, and necessary for carbohydrate metabolism and normal neural activity. Also called vitamin B1.

[Alteration of thiamin : thi(o)- + (vit)amin.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.thiamin - a B vitamin that prevents beriberithiamin - a B vitamin that prevents beriberi; maintains appetite and growth
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