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.
Plum"ming (?), n. [See Plumb.] (Min.) The operation of finding, by
means of a mine dial, the place where to sink an air shaft, or to bring
an adit to the work, or to find which way the lode inclines.
Plum"my (?), a. [From Plum.] Of the nature of a plum; desirable;
profitable; advantageous. [Colloq.] "For the sake of getting something
plummy." G. Eliot.
{ Plu*mose" (?), Plu"mous (?), } a. [L. plumosus, fr. pluma feather:
cf. F. plumeux.]