Plummet
Pronunciation : Plum"met
Part of Speech : n.
Etymology : [OE. plommet, OF. plommet, fr. plom, plum, lead, F. plomb. See Plumb.]
Definition : 1. A piece of lead attached to a line, used in sounding the depth of water. I'll sink him deeper than e'er plummet sounded. Shak.
2. A plumb bob or a plumb line. See under Plumb, n.
3. Hence, any weight.
4. A piece of lead formerly used by school children to rule paper for writing. Plummet line, a line with a plummet; a sounding line.
Source : Webster's Unabridged Dictionary, 1913