noun
full width at half maximum; FWHM
Technical term in physics and signal processing; used to describe the width of a peak at half its maximum height.
このピークの半値全幅は約0.5nmです。
The full width at half maximum of this peak is about 0.5 nm.
Compound of 半値 (half value) and 全幅 (full width), directly describing the measurement concept.