lead

(design engineering) The angle that the tangent to a helix makes with the plane normal to the axis of the helix.
(metallurgy) The angle at the point of welding between an electrode and a line perpendicular to the weld axis.
(ordnance) The angle between the line of sight to a moving target and the line of sight to a point ahead of the target. A dropping angle.
(physics) The phase difference between a sinusoidally varying quantity and a reference quantity which varies sinusoidally at the same frequency, when this phase difference is positive. Also known as angle of lead; lead; phase lead.

A metal pin that extends out from a chip which plugs into a socket or is soldered onto a circuit board. See pin, socket mount, surface mount and lead frame.

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