plummet

PLUM'MET, n. [See Plumb.]

1. A long piece of lead attached to a line, used in sounding the depth of water.

2. An instrument used by carpenters, masons, &c. in adjusting erections to a perpendicular line, and with a square, to determine a horizontal line. It consists of a piece of lead fastened to a line.

3. Any weight.

4. A piece of lead used by school boys to rule their paper for writing.