testing device
nounUK /ˈtestɪŋ dɪˈvaɪs/
US /ˈtestɪŋ dɪˈvaɪs/
A tool that people use to check if something works right.
The engineer used a testing device to see if the battery was still good.
RELATED WORDS
OTHER MEANINGS
2. A machine used in a laboratory to examine how materials behave under stress.
The lab's testing device stretched the metal until it snapped.
3. A piece of software that checks whether a program runs correctly.
The team ran a testing device to catch bugs before the release.
4. A small handheld gadget used to verify electrical circuits.
He touched the testing device to the wire and the light blinked.