Main Entry: sen·sor

Pronunciation: \ˈsen-ˌsȯr, ˈsen(t)-sər\

Function: noun

Etymology: Latin sentire to perceive + English ¹-or — more at sense

Date: circa 1928

1 : a device that responds to a physical stimulus (as heat, light, sound, pressure, magnetism, or a particular motion) and transmits a resulting impulse (as for measurement or operating a control)
2 : sense organ