thi·​a·​mine | \ˈthī-ə-mən, -ˌmēn\
variants: or thiamin \ ˈthī-​ə-​mən \

Definition of thiamine 

: a vitamin C12H17N4OSCl of the vitamin B complex that is essential to normal metabolism and nerve function and is widespread in plants and animals

called also vitamin B1

Examples of thiamine in a Sentence

Recent Examples on the Web

While fresh peas are a good source of fiber, thiamine, folate, manganese, and vitamins A, C, and K, one cup of green peas contains 8.6 grams of protein, less than half of what you’d get from a serving of some of the most common pea protein powders. Sara Angle, Outside Online, "Pea Protein Is the Best Protein," 19 June 2018 Plus, kidney beans are highest in thiamine, a nutrient that may be protective against Alzheimer's disease. The Editors Of Organic Life, Good Housekeeping, "6 Healthiest Beans You Can Eat," 15 Aug. 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thiamine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of thiamine

1937, in the meaning defined above

History and Etymology for thiamine

thiamine alteration of thiamin, from thi- + -amin (as in vitamin)

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Time Traveler for thiamine

The first known use of thiamine was in 1937

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More Definitions for thiamine



English Language Learners Definition of thiamine

: a natural substance (called a vitamin) that is found in certain foods and that helps your body to be healthy


variants: also thiamin \ ˈthī-​ə-​mən \

Kids Definition of thiamine

: a type of vitamin B that is used by the body to convert carbohydrates into energy and to maintain normal nerve function


thi·​a·​mine | \ˈthī-ə-mən, -ˌmēn \
variants: also thiamin \ -​mən \

Medical Definition of thiamine 

: a vitamin C12H17N4OSCl of the vitamin B complex that is an amino hydroxy quaternary ammonium water-soluble salt containing a thiazole ring and a pyrimidine ring, that occurs widely both free (as in the germs of cereals and hulls of grain) and combined (as in yeast and in animal tissues like liver, kidneys, and heart) but is usually synthesized commercially, that functions in the body as a cocarboxylase and is essential for carbohydrate metabolism and for normal functioning of the nervous system, and that is used in nutrition (as in vitamin preparations and in enriching flour and bread) and in medicine

called also vitamin B1

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