plumb bob

plumb bob

n. A usually conical metal weight attached to the end of a plumb line. Also called plummet.

plumb bob

n (Building) the weight, usually of lead, at the end of a plumb line; plummet

plum•met

(ˈplʌm ɪt)

n. 1. the piece of lead or other weight attached to a plumb line; bob of a plumb line. v.i. 2. to fall straight or sharply down; plunge. [1350–1400; Middle English plommet < Middle French, diminutive of plomb lead. See plumb, -et]

Thesaurus

Noun

1.

plumb bob - the metal bob of a plumb line plumb, plummetbob - a hanging weight, especially a metal ball on a stringplumb 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

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