detector
de-tec-tor · noun
Definitions
noun
- 1.
A device designed to discover the presence of something and emit a signal.
- 2.
A person or thing that detects.
Related words
Etymology
From detect + -or (agent suffix). From Latin detegere meaning "to uncover." First recorded in the 1540s meaning "one who detects"; the technical sense developed in the 19th century.