Definitions for vitaminˈvaɪ tə mɪn; Brit. also ˈvɪt ə-; -mɪn, -ˌmin
Random House Webster's College Dictionary
vi•ta•minˈvaɪ tə mɪn; Brit. also ˈvɪt ə-; -mɪn, -ˌmin(n.)
any of a group of organic substances essential in small quantities to normal metabolism, found in minute amounts in natural foodstuffs and also produced synthetically: deficiencies of vitamins produce specific disorders.
Category: Biochemistry, Nutrition
Origin of vitamin:
1912; earlier vitamine < L vīt(a) life +amine ; coined by Casimir Funk (1884–1967), U.S. biochemist, who thought they were amines
any of a group of organic substances essential in small quantities to normal metabolism
Kernerman English Learner's Dictionary
vitamin(noun)ˈvaɪ tə mɪn; Brit. also ˈvɪt ə-
a substance contained in food needed by your body to be healthy
the vitamins found in green vegetables
Any of a specific group of organic compounds essential in small quantities for healthy human growth, metabolism, development, and body function; found in minute amounts in plant and animal foods or sometimes produced synthetically; deficiencies of specific vitamins produce specific disorders.
Origin: 1920, originally vitamine (1912), from vita (see vital) + amine (see amino acid). Vitamine coined by Polish biochemist after the initial discovery of aberic acid (thiamine), when it was thought that all such nutrients would be amines. The term had become ubiquitous by the time it was discovered that vitamin C, among others, had no amine component. In 1920, British biochemist proposed that the final -e be dropped to deemphasize the amine reference. The ending -in was acceptable because it was used for neutral substances of undefined composition. Drummond introduced the lettering system of nomenclature (Vitamin A, B, C, etc.) also at this same time.
A vitamin is an organic compound required by an organism as a vital nutrient in limited amounts. An organic chemical compound is called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from the diet. Thus, the term is conditional both on the circumstances and on the particular organism. For example, ascorbic acid is a vitamin for humans, but not for most other animals, and biotin and vitamin D are required in the human diet only in certain circumstances. By convention, the term vitamin includes neither other essential nutrients, such as dietary minerals, essential fatty acids, or essential amino acids nor the large number of other nutrients that promote health but are otherwise required less often. Thirteen vitamins are universally recognized at present. Vitamins are classified by their biological and chemical activity, not their structure. Thus, each "vitamin" refers to a number of vitamer compounds that all show the biological activity associated with a particular vitamin. Such a set of chemicals is grouped under an alphabetized vitamin "generic descriptor" title, such as "vitamin A", which includes the compounds retinal, retinol, and four known carotenoids. Vitamers by definition are convertible to the active form of the vitamin in the body, and are sometimes inter-convertible to one another, as well.
Translations for vitamin
Kernerman English Multilingual Dictionary
any of a group of substances necessary for healthy life, different ones occurring in different natural things such as raw fruit, dairy products, fish, meat etc
A healthy diet is full of vitamins; Vitamin C is found in fruit and vegetables; (also adjective) vitamin pills.
- vitaminaPortuguese (BR)
- das Vitamin, Vitamin...German
- vitamin; vitamin-Danish
- (de) vitamineFrench
- vitamina; di vitaminaItalian
- ويټامين، په خوړوكې هغه مواد چې دژوند دپاره ضروري ديPashto
- vitamin; vitaminskiSlovenian
- 維生素Chinese (Trad.)
- вітамін; вітаміннийUkrainian
- وٹامن، حياتينUrdu
- sinh tố, vitaminVietnamese
- 维生素Chinese (Simp.)
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