Dictionary.com

adiabatic

[ ad-ee-uh-bat-ik, ey-dahy-uh- ]
/ ˌæd i əˈbæt ɪk, ˌeɪ daɪ ə- /
Save This Word!

adjective
occurring without gain or loss of heat (opposed to diabatic): an adiabatic process.
QUIZ
THINGAMABOB OR THINGUMMY: CAN YOU DISTINGUISH BETWEEN THE US AND UK TERMS IN THIS QUIZ?
Do you know the difference between everyday US and UK terminology? Test yourself with this quiz on words that differ across the Atlantic.
Question 1 of 7
In the UK, COTTON CANDY is more commonly known as…

Origin of adiabatic

1875–80; <Greek adiábat(os) incapable of being crossed (a-a-6 + dia-dia- + ba- (stem of baínein to cross) + -tos verbal adjective suffix) + -ic; cf. diabatic

OTHER WORDS FROM adiabatic

ad·i·a·bat·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for adiabatic

adiabatic
/ (ˌædɪəˈbætɪk, ˌeɪ-) /

adjective
(of a thermodynamic process) taking place without loss or gain of heat
noun
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

Word Origin for adiabatic

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 & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for adiabatic

adiabatic
[ ăd′ē-ə-bătĭk ]

Occurring without gain or loss of heat. When a gas is compressed under adiabatic conditions, its pressure increases and its temperature rises without the gain or loss of any heat. Conversely, when a gas expands under adiabatic conditions, its pressure and temperature both decrease without the gain or loss of heat. The adiabatic cooling of air as it rises in the atmosphere is the main cause of cloud formation.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK