| 释义 |
vitamin B
vitamin Bn.1. Vitamin B complex.2. A member of the vitamin B complex, especially thiamine.
vitamin B1n. See thiamine.
vitamin B2n. See riboflavin.
vitamin B5n. See pantothenic acid.
vitamin B6n. Any of several water-soluble pyridine derivatives, including pyridoxine, pyridoxal, pyridoxamine, and their phosphate esters, found in fish, poultry, potatoes, legumes, whole grains, and enriched foods, and serving as coenzymes in many biochemical processes, especially amino acid synthesis and the formation of neurotransmitters.
vitamin B9n. Folate or folic acid.
vitamin B12n. A water-soluble, cobalt-containing compound that occurs in several forms, is important for nerve cell function, red blood cell formation, and DNA synthesis, and is found in meat, poultry, fish, eggs, dairy products, and fortified foods. Deficiency can result in pernicious anemia. Also called cobalamin, cyanocobalamin.
vitamin Bcn. Folate or folic acid.vitamin B n, pl B vitamins (Elements & Compounds) any of the vitamins in the vitamin B complexvitamin B1
n. thiamine. [1920–25] vitamin B2
n. riboflavin. [1925–30] vitamin B3
n. nicotinic acid. [1975–80] vitamin B6
n. pyridoxine. [1930–35] vitamin B12
n. 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. [1945–50] Thesaurus| Noun | 1. |  vitamin B - originally thought to be a single vitamin but now separated into several B vitaminsB complex, B vitamin, B-complex vitamin, vitamin B complex, Bcholine - a B-complex vitamin that is a constituent of lecithin; essential in the metabolism of fatinositol - an optically inactive alcohol that is a component of the vitamin B complexpantothen, pantothenic acid - a vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids; occurs in many foodswater-soluble vitamin - any vitamin that is soluble in wateraneurin, antiberiberi factor, thiamin, thiamine, vitamin B1 - a B vitamin that prevents beriberi; maintains appetite and growthantipernicious anemia factor, cobalamin, cyanocobalamin, vitamin B12 - a B vitamin that is used to treat pernicious anemiahepatoflavin, lactoflavin, ovoflavin, riboflavin, vitamin B2, vitamin G - a B vitamin that prevents skin lesions and weight lossadermin, pyridoxal, pyridoxamine, pyridoxine, vitamin B6 - a B vitamin that is essential for metabolism of amino acids and starchfolacin, folate, folic acid, pteroylglutamic acid, pteroylmonoglutamic acid, vitamin Bc, vitamin M - a B vitamin that is essential for cell growth and reproductionniacin, nicotinic acid - a B vitamin essential for the normal function of the nervous system and the gastrointestinal tractbiotin, vitamin H - a B vitamin that aids in body growth |
EncyclopediaSeevitamin B1vitamin B
vi·ta·min Ba group of water-soluble substances originally considered as one vitamin.vitamin Bn.1. Vitamin B complex.2. A member of the vitamin B complex, especially thiamine.
vitamin B1n. See thiamine.
vitamin B2n. See riboflavin.
vitamin B6n. Any of several water-soluble pyridine derivatives, including pyridoxine, pyridoxal, pyridoxamine, and their phosphate esters, found in fish, poultry, potatoes, legumes, whole grains, and enriched foods, and serving as coenzymes in many biochemical processes, especially amino acid synthesis and the formation of neurotransmitters.
vitamin B12n. A complex compound containing cobalt, found especially in liver and widely used to treat pernicious anemia. Also called cobalamin, cyanocobalamin, extrinsic factor.
vitamin Bcn. See folic acid.vi·ta·min B (vī'tă-min) A group of water-soluble substances originally considered as one vitamin. neuritis, opticInflammation of the optic nerve, which can occur anywhere along its course from the ganglion cells in the retina to the synapse of these cell fibres in the lateral geniculate body. If the inflammation is restricted to the optic nerve head the condition is called papillitis (or intraocular optic neuritis) and if it is located in the orbital portion of the nerve it is called retrobulbar optic neuritis (or orbital optic neuritis).In papillitis the optic nerve head is hyperaemic with blurred margins and slightly oedematous. Haemorrhages and exudates may also appear. In retrobulbar optic neuritis, there are usually no visible signs in the fundus of the eye until the disease has advanced and optic atrophy may appear. However, both types are accompanied by a loss of visual acuity along with a central scotoma and impairment of colour vision. The loss of vision may occur abruptly over a few hours and recovery may be equally rapid but in some patients the loss may be slow. In retrobulbar optic neuritis, there is also pain on movement of the eyes and sometimes tenderness on palpation. The disease is usually unilateral although the second eye may become involved later. It is usually transient and full or partial recovery takes place within weeks. The primary cause of optic neuritis is multiple sclerosis but it may also be associated with severe inflammation of the retina or choroid, vitamin B deficiency, diabetes mellitus, thyroid disease, lactation, toxicity or syphilis. See Devic's disease; papilloedema; Marcus Gunn pupil; Kollner's rule; photostress test.vi·ta·min B (vī'tă-min) Group of water-solublesubstances originally considered as one vitamin. vitamin B
Related to vitamin B: vitamin B complex, vitamin B1, vitamin D, Vitamin b deficiencySynonyms for vitamin Bnoun originally thought to be a single vitamin but now separated into several B vitaminsSynonyms- B complex
- B vitamin
- B-complex vitamin
- vitamin B complex
- B
Related Words- choline
- inositol
- pantothen
- pantothenic acid
- water-soluble vitamin
- aneurin
- antiberiberi factor
- thiamin
- thiamine
- vitamin B1
- antipernicious anemia factor
- cobalamin
- cyanocobalamin
- vitamin B12
- hepatoflavin
- lactoflavin
- ovoflavin
- riboflavin
- vitamin B2
- vitamin G
- adermin
- pyridoxal
- pyridoxamine
- pyridoxine
- vitamin B6
- folacin
- folate
- folic acid
- pteroylglutamic acid
- pteroylmonoglutamic acid
- vitamin Bc
- vitamin M
- niacin
- nicotinic acid
- biotin
- vitamin H
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