Pendulum level

a plumb level. See under Level.

pendulum level

[′pen·jə·ləm ‚lev·əl] (engineering) 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).

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.

ThesaurusSeeplumb level

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