noun \ˈal-kə-ˌlī\

chemistry : a substance that has a bitter taste and that forms a salt when mixed with an acid

plural al·ka·lies or al·ka·lis

Full Definition of ALKALI

:  a soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate; broadly :  a substance (as a hydroxide or carbonate of an alkali metal) having marked basic properties — compare base 7a
:  a soluble salt or a mixture of soluble salts present in some soils of arid regions in quantity detrimental to agriculture

Origin of ALKALI

Middle English, from Medieval Latin, from Arabic al-qili the ashes of the plant saltwort
First Known Use: 14th century

Other Chemical Engineering Terms

cation, decant, hygroscopic, isotope, oxidize, slurry, solute, viscous

Rhymes with ALKALI

abide by, Adonai, alibi, amplify, apple-pie, argufy, assegai, azo dye, basify, beautify, butterfly, by-and-by, caddis fly, calcify, certify, Chou En-lai, citify, clarify, classify, coalify, cockneyfy, codify, college try, cottage pie, crucify, cut-and-try, cutie-pie, DIY, damnify, damselfly, dandify, deify, densify, dignify, dobsonfly, do-or-die, dragonfly, dulcify, eagle eye, edify, evil eye, falsify, fancify, fortify, frenchify, fructify, gasify, Gemini, gentrify, glorify, goggle-eye, goldeneye, gratify, Haggai, harvest fly, hexerei, high and dry, hip and thigh, Hokusai, hook and eye, horrify, hoverfly, humble pie, Iceni, justify, kiss good-bye, lazy eye, lignify, liquefy, lithify, Lorelei, lullaby, Madurai, magnify, Malachi, Maracay, minify, modify, mollify, Molokai, Mordecai, mortify, multi-ply, multiply, mummify, mystify, nazify, notify, nullify, occupy, old school tie, on standby, on the fly, ossify, overbuy, overfly, overlie, pacify, Paraguay, passerby, peccavi, petrify, PPI, preachify, prettify, private eye, prophesy, purify, putrefy, qualify, quantify, ramify, rarefy, ratify, RBI, rectify, reify, res gestae, robber fly, runner's high, Russify, samurai, sanctify, satisfy, scarify, schwarmerei, semidry, set store by, shepherd's pie, shoofly pie, signify, simplify, Spanish fly, specify, speechify, stratify, stultify, stupefy, sweetie pie, Tenebrae, terrify, testify, tie-and-dye, tigereye, Trans Alai, tumble dry, typify, uglify, underlie, unify, Uruguay, Veneti, verify, versify, vilify, vinify, vitrify, vivify, weather eye, Windsor tie, xanthene dye, yuppify, zombify


noun \ˈal-kə-ˌlī\   (Medical Dictionary)
plural al·ka·lies or al·ka·lis

Medical Definition of ALKALI

: a substance (as a hydroxide or carbonate of an alkali metal) having marked basic properties—compare base


noun    (Concise Encyclopedia)

Inorganic compound, any soluble hydroxide (OH) of the alkali metals: lithium, sodium, potassium, rubidium, and cesium. More broadly, ammonium hydroxide (see ammonia) and soluble hydroxides of the alkaline earth metals are also called alkalies. Strong bases that turn litmus paper blue, they react with acids to yield salts, are caustic, and in concentrated form corrode tissues. Sodium hydroxide (caustic soda) and potassium hydroxide (caustic potash) are very important industrial chemicals, used in the manufacture of soaps, glass, and many other products. The mineral trona, a compound of sodium carbonate and bicarbonate, is one naturally occurring alkali. It may be mined or recovered from dry lake beds.


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