1) Sounding device 
A plumb-bob or a plummet is a weight, usually with a pointed tip on the bottom, that is suspended from a string and used as a vertical reference line, or plumb-line. It is essentially the vertical equivalent of a `water level`. The instrument has been used since at least the time of ancient Egypt to ensure that constructions are `plumb`, or ve...
A weight with a pointed tip that is attached to a string. The force of gravity causes the weighted line to hang vertically, or plumb. Plumb bobs come in different weights; the most common are 6, 8, and 12 ounces. To mark a vertical line on a wall: • Hang a plumb bob from a chalk-coated strin...
A lead weight attached to a string. It is the tool used in determining plumb. 
- A lead weight attached to a string. It is the tool used in determining plumb.
A shaped metal weight that is suspended from the lower end of a line to determine the vertical trueness.
[n] - the metal bob of a plumb line
plumb bob Usually a conical metal weight attached to the end of a plumb line.
plumb noun the metal bob of a plumb line
Holding the putter in a vertical position and using it as a sight to determine the Line of Putt.
A lead weight attached to a string. It is the tool used in determining plumb.
A lead weight attached to a string. It is the tool used in determining plumb.
[Logging] Special tool used to establish the outward lean or slant of a tree in relation to its base. Generally a lead weight attached to piece of string is used.