noun
Technical term in physics and engineering for a theoretical vacuum with zero particles and zero pressure.
理想真空の状態を実験室で完全に再現することはできない。
It is impossible to perfectly reproduce a perfect vacuum in the laboratory.
真空 is a general term for vacuum, while 理想真空 specifically refers to the theoretical concept of a perfect vacuum.
Compound of 理想 (ideal) and 真空 (vacuum).