adiabatical

Adjective

adiabatic (not comparable)

1. Without gain or loss of heat (and thus with no change in entropy, in the quasistatic approximation).
   • The line drawn on the indicator diagram in the latter case has been named by Professor Rankine an Adiabatic line, because it is defined by the condition that heat is not allowed to pass through (διαβαίνειν) the vessel which confines the substance.1871, James Clerk Maxwell, Theory of Heat, page 129

   Antonyms:

   diabatic

2. (quantum mechanics) Involving the slow change of the Hamiltonian of a system from its initial value to a final value.
   • In this section we examine the limiting cases when T is very small (sudden change) and very large (adiabatic change).1961, Albert Messiah, Quantum Mechanics, volume II, page 740

   Antonyms:

   nonadiabatic

See all 3 meanings of adiabatic