adiabatic

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ad·i·a·bat·ic

 (ăd′ē-ə-băt′ĭk, ā′dī-ə-)
adj.
Of, relating to, or being a reversible thermodynamic process that occurs without gain or loss of heat and without a change in entropy.

[From Greek adiabatos, impassable : a-, not; see a-1 + diabatos, passable (dia-, dia- + batos, passable, from bainein, to go; see gwā- in Indo-European roots).]

ad′i·a·bat′i·cal·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

adiabatic

(ˌædɪəˈbætɪk; ˌeɪ-)
adj
(General Physics) (of a thermodynamic process) taking place without loss or gain of heat
n
(General Physics) a curve or surface on a graph representing the changes in two or more characteristics (such as pressure and volume) of a system undergoing an adiabatic process
[C19: from Greek adiabatos not to be crossed, impassable (to heat), from a-1 + diabatos passable, from dia- across + bainein to go]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ad•i•a•bat•ic

(ˌæd i əˈbæt ɪk, ˌeɪ daɪ ə-)

adj.
occurring without gain or loss of heat: an adiabatic process.
[1875–80; < Greek adiábat(os) incapable of being crossed]
ad`i•a•bat′i•cal•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

ad·i·a·bat·ic

(ăd′ē-ə-băt′ĭk)
Occurring without gain or loss of heat. The passage of sound through air is generally adiabatic.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.adiabatic - occurring without loss or gain of heat; "adiabatic expansion"
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
diabatic - involving a transfer of heat; "a diabatic process"
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