- A conductor, usually a wire, by which circuit elements or points are connected to components, devices, equipment, systems, points, or materials. Also called lead wire.
- The state or condition of being ahead, or preceding, in time or phase. Also, that which leads. Also, the extent of such a lead. For example a lead angle, or a leading current.
- A dense and soft grayish silvery-blue metallic chemical element whose atomic number is 82. It is poisonous, malleable, ductile, and corrosion resistant. Lead is a poor electrical conductor, and has about 35 known isotopes, of which 4 are stable. It has many applications including its use in storage batteries, in cable coverings, in solder and fusible alloys, in ceramics, certain glasses, and as a radiation shield. Its chemical symbol, Pb, is from the Latin word for lead: plumbum.
- chemical symbol Pb
- Within the YPbPr color model, one of the two color-difference signals. The other is Pr (2).
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