checkingliquid
nounUK /ˈtʃɛkɪŋ ˈlɪkwɪd/
US /ˈtʃɛkɪŋ ˈlɪkwɪd/
A checking liquid is a special liquid you use to test something and see what happens.
The scientist added a checking liquid to the water to see if it changed color.
RELATED WORDS
OTHER MEANINGS
2. A liquid used in a machine to check its parts or how it works.
The mechanic used a checking liquid to look for leaks in the engine.
3. A fluid that shows a change, like a color shift, when something is wrong.
The checking liquid turned pink, so we knew the sample was not safe.
4. A liquid used to inspect or verify the quality of a product.
Workers put a drop of checking liquid on each metal piece to test its surface.