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quadrature
Definitions
[ˈkwɒdrətʃə], (Noun)
Definitions:
- the process of constructing a square with an area equal to that of a circle, or of another figure bounded by a curve.
- the position of the moon or a planet when it is 90° from the sun as viewed from the earth.
- a phase difference of 90 degrees between two waves of the same frequency, as in the colour difference signals of a television screen.
Phrases:
Origin
:
mid 16th century (as a mathematical term): from Latin quadratura ‘a square, squaring’, from quadrare (see quadrate)
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definition by Oxford Dictionaries