Plummet
From BiblePortal Wikipedia
Webster's Dictionary [1]
(1): ( n.) A plumb bob or a plumb line. See under Plumb, n.
(2): ( n.) A piece of lead attached to a line, used in sounding the depth of water.
(3): ( n.) Hence, any weight.
(4): ( n.) A piece of lead formerly used by school children to rule paper for writing.
King James Dictionary [2]
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.