American Heritage® Dictionary of the English Language, Fourth Edition
- n. A surveyor's instrument having a short telescope fixed rigidly to a horizontally rotating table.
GNU Webster's 1913
- (Surv.) A level having a short telescope (hence its name) rigidly fixed to a table capable only of rotatory movement in a horizontal plane. The telescope is usually an inverting one. It is sometimes called the
Troughton level, from the name of the inventor, and a variety improved by one Gavatt is known as the Gavatt level.
- n. a surveyor's level having a short telescope fixed to a horizontally rotating table and a spirit level
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