noun
adiabatic approximation
Technical term in physics for an approximation that treats a process as adiabatic (no heat exchange).
断熱近似を用いて分子の振動を計算する。
Calculate molecular vibrations using the adiabatic approximation.
Compound of 断熱 (だんねつ, 'heat insulation' or 'adiabatic') and 近似 (きんじ, 'approximation').