plumb bob


Also found in: Dictionary, Thesaurus, Financial, Wikipedia.
Related to plumb bob: plumb line

plumb bob

[′pləm ‚bäb]
(engineering)
A weight suspended on a string to indicate the direction of the vertical.

plumb bob, plummet

A shaped metal weight which is suspended from the lower end of a line to determine the vertical. (See illustration p. 744.)
References in periodicals archive ?
Make a plumb bob line - a piece of string with a heavy object on the end, the height of your wall - so that you can hold it against the wall when you need to mark the wall with a pencil.
Main Instrument, Lens Cap, Plumb Bob, Vinyl Cover, Cleaning Cloth, Tool Kit Operators Manual, Carrying Case With One Aluminium Telescopic Tripod And 5 Mtrs, 3 Section Aluminium Levelling Staff 2 Nos.
A spirit-level, a plumb bob and St John the Baptist
Alexander's Lure is a 10-foot-tall, 280-pound ovoid, suspended by a chain and looking, says Scaled Composites Vice President Mike Melvill, like ``a big plumb bob.
Alternatively, some sort of plumb bob also will work.
Nikon AE-7 Automatic Level Model AE-7 30x with Plumb Bob & Case - Item #HGA23111
This revolutionary device has a built-in bubble level, as well as a single vertical line in the center of the acrylic lens that acts as a perfect plumb bob.
PHOTO A 1957 file photo shows a Lookout Mountain Studios cameraman photographing a mushroom cloud during Operation Plumb Bob.
Plane table fitted with non magnetic metel plate with wooden stand with accessories such as Alidade in wooden box 18, plumb bob, U fork, magnet, treble tube etc.
Goodrich Petroleum Corporation today announced that it has acquired certain rights from a private company covering the Plumb Bob Field in St.
Tenders are invited for Automatic Level B-40 Model Sokkia Make Or Equivalent Complete With Aluminium Telescope Stand With All Standard Accessories Instrument, Lens Cap, Plumb Bob, Vinyl Cover, Cleaning Cloth, Tool-Kit, Operators Manual And Carrying Case .