IPA: /dɪˈtɛktər/
KK: /dɪˈtɛktər/
A device that identifies or measures something, often used to find changes in the environment or detect signals.
The smoke detector went off when it sensed smoke in the kitchen.
Detector → It is formed from "de-" (meaning down or away) and "tangere" (meaning to touch). The word "detector" refers to a device that touches or senses something to reveal its presence or existence.
Think of a device that 'touches' or senses something 'away' or 'down' to find it — that's why a detector is used to reveal hidden things.