Answer: quadrature

AnswerCrossword Clue
QUADRATUREAct of squaring
QUADRATURESquaring process
quadratureThe process of constructing a square with an area equal to that of a circle, or of another figure bounded by a curve
quadratureA phase difference of 90░ between two waves of the same frequency, as in the color difference signals of a television screen
quadratureThe position of the moon or a planet when it is 90░ from the sun as viewed from the earth
quadraturethe finding of a square having the same area as some given curvilinear figure