plumb bob

Noun
Synonyms: plumb bobplumbplummet

WordNet 3.0

Noun (1)

  1. the metal bob of a plumb lineSynonyms: plumb bobplumbplummet
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Webster's Dictionary (GCIDE)

Plumb \Plumb\ (pl[u^]m), n. [F. plomb, L. plumbum lead, a leaden ball or bullet; cf. Gr. mo`lybos, mo`libos, mo`lybdos. Cf. Plummet, Plunge.] A little mass or weight of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction; a plummet; a plumb bob. See Plumb line, below. [1913 Webster]

Plumb bob. See Bob, 4.

Plumb joint, in sheet-metal work, a lap joint, fastened by solder.

Plumb level. See under Level.

Plumb line. (a) The cord by which a plumb bob is suspended; a plummet. (b) A line directed to the center of gravity of the earth.

Plumb rule, a narrow board with a plumb line, used by builders and carpenters. [1913 Webster]

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