{n: Kirchhoff's laws} (physics) two laws governing electric networks in which steady currents flow: the sum of all the currents at a point is zero and the sum of the voltage gains and drops around any closed circuit is zero
{n: ground zero} the point of detonation (or above or below) of a nuclear weapon
{n: origin} the point of intersection of coordinate axes; where the values of the coordinates are all zero
{n: phase, phase angle} a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle
{n: straight line} a line traced by a point traveling in a constant direction; a line of zero curvature
"the shortest distance between two points is a straight line"
<-> curve
{n: zero, zero point} the quantity that registers a reading of zero on a scale
{v: range in, home in, zero in} direct onto a point or target, especially by automatic navigational aids
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