noun
physical quantity
Technical term in physics and engineering for a measurable property such as length, mass, time, or temperature.
長さや質量は基本的な物理量です。
Length and mass are fundamental physical quantities.
この式では、各物理量に単位を付けて計算してください。
In this formula, please perform the calculation by attaching units to each physical quantity.
量 is a general term for 'quantity' or 'amount'; 物理量 narrows it to physical quantities.
Compound of 物理 (physics) and 量 (quantity). A straightforward modern technical term.