millimeter wave; milli-wave
Technical term for electromagnetic waves with wavelengths in the millimeter range, commonly used in radar, telecommunications, and imaging.
Millimeter waves are used in 5G communication.
ミリ波レーダーは自動運転に欠かせない。
Millimeter-wave radar is essential for autonomous driving.
Compound of ミリ (from 'milli-', meaning one-thousandth) and 波 (wave).