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Definition of Alkali

Babylon English

soluble base, any of a class of bases which neutralize acids to form salts (Chemistry)
Alkali Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
Soda ash; caustic soda, caustic potash, etc.
One of a class of caustic bases, such as soda, potash, ammonia, and lithia, whose distinguishing peculiarities are solubility in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version

waste \alkali waste\ waste material from the manufacture of alkali; specif., soda waste.

  similar words(9) 

 alkali green 
 alkali waste 
 volatile alkali 
 vegetable alkali 
 fixed alkali 
 alkali flat 
 alkali soil 
 alkali albumin 
 alkali grass 
for Vocabulary Exams of KPDS, YDS,UDS (in Turkey); and SAT in America
Anything that will neutralize an acid, as lime, magnesia, etc.
Concise English-Irish Dictionary v. 1.1
WordNet 2.0

1. any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water; "bases include oxides and hydroxides of metals and ammonia"
(synonym) base
(hypernym) compound, chemical compound
(hyponym) pyridine
(derivation) alkalize, alkalise, alkalify, basify
2. a mixture of soluble salts found in arid soils and some bodies of water; detrimental to agriculture
(hypernym) salt
(derivation) alkalize, alkalise, alkalify, basify
Alkali Definition from Science & Technology Dictionaries & Glossaries
Electrochemistry Dictionary
See base.
General Chemistry Glossary
Compare with acid . 1. a compound that reacts with an acid to form a salt . 2. a compound that produces hydroxide ions in aqueous solution (Arrhenius). 3. a molecule or ion that captures hydrogen ions.(Bronsted-Lowry). 4. a molecule or ion that donates an electron pair to form a chemical bond.(Lewis).
Technical English by wpv
A substance having marked basic properties. Applying to hydroxides of potassium, sodium, lithium, and ammonium. They turn red litmus to blue. Includes hydroxides of the alkaline earth metals of barium, strontium, and calcium.
Alkali Definition from Computer & Internet Dictionaries & Glossaries
Integrated Circuit Terminology
acid neutralizing substance. A soluble salt with base properties..
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Alkali Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
In chemistry, an alkali (; from Arabic: al-qaly القلي, القالي , “ashes of the saltwort”) is a basic, ionic salt of an alkali metal or alkaline earth metal chemical element. An alkali also can be defined as a base that dissolves in water. A solution of a soluble base has a pH greater than 7.0. The adjective alkaline is commonly, and alkalescent less often, used in English as a synonym for basic, especially for soluble bases. This broad use of the term is likely to have come about because alkalis were the first bases known to obey the Arrhenius definition of a base, and they are still among the most common bases.

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Alkali Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
Any strongly basic (high pH) substance capable of neutralizing an acid, such as soda, potash, etc., that is soluble in water and increases the pH of a solution greater than 7.0. Also refers to soluble salts in soil, surface water, or groundwater.
  Various soluble salts, principally of sodium, potassium, magnesium, and calcium, that have the property of combining with acids to form neutral salts and may be used in chemical water treatment processes.
Alkali Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
Alkali Definition from Medicine Dictionaries & Glossaries
Dictionary of Medicine (Shahram)
one of many substances which neutralize acids and form salts
NOTE: British English plural is alkalis, but US English is alkalies