adiabatic
(adjective) occurring without loss or gain of heat; “adiabatic expansion”
Source: WordNet® 3.1
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.
• (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
3 April 2025
(noun) an assemblage of parts that is regarded as a single entity; “how big is that part compared to the whole?”; “the team is a unit”
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