(in sheet metal work) a soldered lap joint.
noun 1. a cord with a lead bob attached to one end, used to determine perpendicularity, the depth of water, etc. Compare (def 1). 2. . noun 1. a string with a metal weight at one end that, when suspended, points directly towards the earth’s centre of gravity and so is used to determine verticality, […]
[pluhm] /plʌm/ noun 1. a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line. Compare . adjective, Also, . 2. true according to a plumb line perpendicular. 3. Informal. downright or absolute. adverb, Also, . 4. […]
[pluhm-buh s] /ˈplʌm bəs/ adjective, Chemistry. 1. containing bivalent lead. /ˈplʌmbəs/ adjective 1. of or containing lead in the divalent state adj. 1680s, “leaden;” 1854 in chemistry sense, “containing lead” (especially in a low valence), from Latin plumbosus “full of lead,” from plumbum (see plumb (n.)).
noun 1. a device for determining perpendicularity, consisting of a narrow board with a plumb line and bob suspended from an upper edge. noun 1. a plumb line attached to a narrow board, used by builders, surveyors, etc