[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:
late Middle English (denoting squareness): from Latin quadratura ‘division of land into squares’, from quadrare (see quadrate)