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Answer for the clue "Opera upset bass with a sudden movement involving no warmth ", 9 letters:
adiabatic

Word definitions for adiabatic in dictionaries

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1838, from Greek adiabatos "not to be passed through," from a- "not" + dia "through" (see dia- ) + batos "passable," from bainein "to go" (see come ).

WordNet Word definitions in WordNet
adj. occurring without loss or gain of heat; "adiabatic expansion" [ant: diabatic ]

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Adiabatic \Ad`i*a*bat"ic\, a. [Gr. ? not passable; 'a priv. + ? through + ? to go.] (Physics) Not giving out or receiving heat. -- Ad`i*a*bat`ic*al*ly , adv. Note: The adiabatic expansion of carbon dioxide from a compressed container causes the temperature ...

Wiktionary Word definitions in Wiktionary
a. 1 (context physics thermodynamics of a process English) That occurs without gain or loss of heat (and thus with no change in entropy, in the quasistatic approximation). 2 (context physics quantum mechanics of a process English) That involves the slow ...

Usage examples of adiabatic.

They feed all these numbers into a Cray, and the animal pounds away, megaflops, on a simulation that knows everything about adiabatic cooling, turbulence, vapor pressures, topography, solar radiation.

That stretching and flexing would appear as adiabatic heating and cooling, driving the local temperature up and down differentially along the length.