Similar words: plumb, plumber, plumbing, unplumbed, dumbbell, plum, plump, plume. Meaning: n. the metal bob of a plumb line.
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(1) A plumb bob is useful to check the alignment of the header with the sill.
(2) If the mass in question is a plumb bob, the horizontal component of F is important.
(3) The magnetic surveying instrument uses a magnetic compass card , plumb bob, and modified movie camera that is activated by a timer.
(4) If you have a good eyeball you can do it that way or use a plumb bob .
(5) The gyroscopic surveying instrument uses a gyroscope, compass card, plumb bob, and modified movie camera.
More similar words: plumb, plumber, plumbing, unplumbed, dumbbell, plum, plump, plume, plumed, plumpy, plummet, plumule, plumage, sugarplum, plumpness, nom de plume, lumber, lumbar, slumber, clumber, lumbago, columbia, columbus, columbian, lumbering, columbine, lumberman, borrowed plumes, lumberyard, lumberjack.