1. An acoustic radiometer consisting of a light disk suspended from a quartz thread; when exposed to a progressive sound wave its torque can measure velocity

Type of: radiometer

• from way back
• fromage frais
• Fromental Halevy
• frond
• Fronde
• fronded
• front
• front bench
• front burner
• front crawl
• front door
• front end
• front entrance
• front line
• front man
• front matter
• front porch
• front projector
• front room
• front tooth
• front yard
• front-porch campaign
• front-porch campaigning
• front-runner
• frontage