a light-transmitting device having transmissions that vary in accordance with an electric input, as voltage, current, or an electron beam, used chiefly for recording sound on motion-picture film.
💡- Electric Light Bulb Emoji - Emoji by Dictionary.comRead more in this article about some frequently asked questions and fun facts related to our definitions.
Origin of light valve
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019