noun. meter to detect and measure radiant energy (electromagnetic or acoustic).
- Crookes radiometer
- Rayleigh disk
- -meter (English)
- μέτρον (Ancient Greek (to 1453))
- radio- (English)
- radius (Latin)
Example sentences of the word radiometer
1. Noun, singular or mass
Strike a match and watch it burn or put a radiometer in a sunny spot and watch it spin.