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Acid
English
Etymology
Latin acidus sour, from the root ak , be sharp; compare French acide . Also acute.
Adjective
acid
- Sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, acid fruits or liquors.
- (Figuratively): Sour-tempered.
- Quotations
- He was stern and his face as acid as ever. - Anthony Trollope
- Of or pertaining to an acid; as, acid reaction.
Antonyms
Translations
- Breton: trenk , sur
- Catalan: àcid m (1,2), àcida f (1,2)
- Dutch: zuur, zure
- Esperanto: acido
- Estonian: hapu (1)
- Finnish: hapan (1), happo- (2, in compounds)
- French: acide , aigre
- German: sauer
- Greek: (oxy)
- Ido: acida
- Indonesian: asam (1,2)
- Interlingua: acide (1,2)
- Italian: acido
- Japanese: 酸性 (さんせい, sansei) (2)
- Korean: 산성의 [酸性-] (sanseongui)
- Polish: kwaśny m, kwaśna f, kwaśne n
- Portuguese: ácido m (1,2), ácida f (1,2); azedo m (1), azeda f (1)
- Spanish: ácido m (1), acido m (2), ácida f (2)
- Swedish: sur (1,2)
Noun
acid, plural acids
- A sour substance.
- (Chemistry): One of a class of compounds, generally distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They neutralize alkalis or bases, combining with them to form salts. They all contain hydrogen, united with a more negative element or radical, either alone or with oxygen, and take their names from this negative element or radical. Those which contain no oxygen are sometimes called hydracids in distinction from the others which are called oxygen acids or oxacids .
Note
In certain cases, sulphur, selenium, or tellurium may take the place of oxygen, and the corresponding compounds are called respectively sulphur acids or sulphacids , selenium acids, or tellurium acids. When the hydrogen of an acid is replaced by a positive element or radical, a salt is formed, and hence acids are sometimes named as salts of hydrogen; as hydrogen nitrate for nitric acid, hydrogen sulphate for sulphuric acid, etc. In the old chemistry the name acid was applied to the oxides of the negative or nonmetallic elements, sometimes called anhydrides
Antonyms
Derived terms
Types of acids
Translations
See also
- pH
- Wikipedia article on acid
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