level transit

level

1. A surveying instrument for measuring heights with respect to an established horizontal line of sight; consists of a telescope and attached spirit level, a rotatable mounting, and a tripod. Also see wye level and dumpy level.

2. The position of a line or plane when parallel to the surface of still water.

3.See spirit level.

4. Of an acoustical quantity, 10 times the logarithm (base 10) of the ratio of the quantity to a reference quantity of the same physical kind.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.