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alkali any of a category of base chemicals, made up of hydroxides of certain metals and of ammonium, which neutralize acids to form salts. [2 definitions]
alkali metal any of a group of highly reactive chemical elements, such as sodium and potassium, that are typically univalent cations forming various compounds, but that can be isolated as soft, low-density metals.
alkaline of, containing, or similar to an alkali. [2 definitions]
alkaline-earth metal any of a group of highly reactive chemical elements, such as calcium and magnesium, that are typically divalent cations and form compounds with various other elements.
alkalinize to produce an alkali from (a chemical group). [2 definitions]
alkalize see alkalinize.
alkaloid any of various nitrogen-containing organic bases found in plants and from which drugs such as nicotine, quinine, and morphine are made.
alkalosis a pathological condition of the body fluids, characterized by a dangerously high alkali content.
alkane series the series of saturated hydrocarbons that includes methane and ethane; methane series; paraffin series.
Alkoran the Koran.
alkyd one of a group of sticky resins used in the manufacture of adhesives and paints.
all the total amount, extent, or number; every one. [12 definitions]
all- completely or exclusively. [4 definitions]
Allah in the religion of Islam, the name of the supreme deity.
all along from the beginning; the whole time.
all-American pertaining to an individual or group of players selected as the best in the United States in any particular sport. [5 definitions]
allargando gradually slower and broader, with more weight or power (used as a musical direction).
all-around able to do a variety of things; not specialized; versatile. [2 definitions]
allay to quiet or lay to rest (fears, doubts, and the like). [2 definitions]
all clear the signal that an air raid or disaster drill is over.
allegation an assertion made in the absence of positive proof. [3 definitions]