noun
preequilibrium process
Technical term in physics for a process occurring before equilibrium is reached.
前平衡過程は、系が完全な熱平衡に達する前の段階を指す。
A preequilibrium process refers to the stage before the system reaches full thermal equilibrium.
Compound of 前 (pre-) + 平衡 (equilibrium) + 過程 (process).