ADIABATIC

adiabatic

(adjective) occurring without loss or gain of heat; “adiabatic expansion”

Source: WordNet® 3.1

Etymology

Adjective

adiabatic (not comparable)

(physics, thermodynamics, of a process) That occurs without gain or loss of heat (and thus with no change in entropy, in the quasistatic approximation).

(physics, quantum mechanics, of a process) That involves the slow change of the Hamiltonian of a system from its initial value to a final value.

Antonyms

• (thermodynamics): diabatic

• (quantum mechanics): nonadiabatic

Source: Wiktionary

Ad`i*a*bat"ic, a. Etym: [Gr. (Physics)

Definition: Not giving out or receiving heat.

– Ad`i*a*bat`ic*al*ly, adv. Adiabatic line or curve, a curve exhibiting the variations of pressure and volume of a fluid when it expands without either receiving or giving out heat. Rankine.

Source: Webster’s Unabridged Dictionary 1913 Edition

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