plumb rule


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plumb rule

n.
A narrow strip of wood with a plumb line hanging from it, used to test verticality.

plumb rule

n
(Building) a plumb line attached to a narrow board, used by builders, surveyors, etc

plumb′ rule`


n.
a device for determining perpendicularity, consisting of a narrow board with a plumb line hanging from it.
[1350–1400]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.plumb rule - a plumb line attached to a narrow boardplumb rule - a plumb line attached to a narrow board
plumb line, perpendicular - a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point