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[uh-zee-uh-trohp, ey-zee-] /əˈzi əˌtroʊp, ˈeɪ zi-/
noun, Physical Chemistry
any liquid mixture having constant minimum and maximum boiling points and distilling off without decomposition and in a fixed ratio, as isopropyl alcohol and water.
Origin of azeotrope
1910-15; a-6 + Greek (ein) to boil + -o- + -trope
Related forms
[ey-zee-uh-trop-ik, -troh-pik] /ˌeɪ zi əˈtrɒp ɪk, -ˈtroʊ pɪk/ (Show IPA),
[ey-zee-o-truh-pee] /ˌeɪ ziˈɒ trə pi/ (Show IPA),
azeotropism, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for azeotrope
  • The coal was dried by distilling off some of the chlorobenzene-water azeotrope.
  • In addition to azeotrope formation, the single theoretical plate distillation technique suffers from inadequate separation.
  • It is an azeotrope, so it will not fractionate during operation.
  • The boiling points of the pure components must be sufficiently close to permit the formation of an azeotrope.
  • Although ethanol is soluble in water and actually forms an azeotrope, it can be sparged from the water.
British Dictionary definitions for azeotrope


a mixture of liquids that boils at a constant temperature, at a given pressure, without change of composition
Derived Forms
azeotropic (ˌeɪzɪəˈtrɒpɪk) adjective
Word Origin
C20: from a-1 + zeo-, from Greek zein to boil + -trope
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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azeotrope in Medicine

azeotrope a·ze·o·trope (ə-zē'ə-trōp', ā'zē-)
A liquid mixture of two or more substances that retains the same composition in the vapor state as in the liquid state when distilled or partially evaporated under a certain pressure.

a'ze·o·trop'ic (a'zē-ə-trŏp'ĭk, -trō'pĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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