photosensor

[ foh-tuh-sen-ser, -sawr ]
/ ˈfoʊ təˌsɛn sər, -sɔr /

noun

a photocell used to detect light.

Origin of photosensor

First recorded in 1960–65; photo- + sensor
Also called photodetector.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019