Also found in: Dictionary, Thesaurus.
pendulum level[′pen·jə·ləm ‚lev·əl]
A leveling instrument in which the line of sight is automatically kept horizontal by a built-in pendulum device (such as a horizontal arm and a plumb line at right angles to the arm).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
plumb level, pendulum level
A level consisting of a bar and a plumb line; the bar is set in true horizontal position by placing it at a right angle to the plumb line.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.