Plūmb1, n.
(plŭm), n. [Lat. plumbum, lead, a leaden ball or bullet; Fr. plomb, Pr. plom, Sp. plomo, Pg. chumbo, It. piombo, W. plwm.] A mass or weight of lead or other material attached to a line, and used to indicate a vertical direction, as in erecting buildings, &c.; a plummet; — rarely used except in composition. See PLUMB-LINE.