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phasor

[fey-zer]
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noun Physics.
  1. a vector that represents a sinusoidally varying quantity, as a current or voltage, by means of a line rotating about a point in a plane, the magnitude of the quantity being proportional to the length of the line and the phase of the quantity being equal to the angle between the line and a reference line.
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Origin of phasor

First recorded in 1940–45; phase + (vect)or
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for phasor

phasor

noun
  1. electrical engineering a rotating vector representing a quantity, such as an alternating current or voltage, that varies sinusoidally
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012