plumb linenoun [ C ]
uk/ˈplʌm ˌlaɪn/us/ˈplʌm ˌlaɪn/a piece of string with a weight attached to one end, used either to test if something vertical, such as a wall, is exactly straight, or to find the depth of water
Thesaurus: synonyms and related words
Measuring, weighing, & counting devices
- calculator
- calipers
- detector
- dipstick
- gradation
- hydrograph
- instrument
- light meter
- manometer
- meter
- micrometer
- potometer
- rangefinder
- ruler
- scope
- sensor
- spirit level
- tape measure
- theodolite
- weighbridge
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