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spirit level

noun

, Surveying.
  1. a device for determining true horizontal or vertical directions by the centering of a bubble in a slightly curved glass tube or tubes filled with alcohol or ether.


spirit level

noun

  1. a device for setting horizontal surfaces, consisting of an accurate block of material in which a sealed slightly curved tube partially filled with liquid is set so that the air bubble rests between two marks on the tube when the block is horizontal
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of spirit level1

First recorded in 1760–70
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Example Sentences

The terrain was fairly level, but a spirit level would have shown a marked tilt to the east.

Fasten a double or two-way spirit level on the front left-hand corner.

If it were not for this principle of capillary attraction, it would be difficult to form a bubble of air in a spirit level.

Place it lightly in a vice, and in such a position that a spirit-level on top shows the bubble exactly in the centre.

With chain and spirit level the route was carefully surveyed from Lynchburg to the Ohio.

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