Pronunciation: ' kwä-dr ə - ˌ chu ̇ r, -ch ə r, - ˌ tyu ̇ r, - ˌ tu ̇ r
Function: noun
Date: 1591
1 : a configuration in which two celestial bodies (as the moon and the sun) have an angular separation of 90 degrees as seen from the earth
2 : the process of finding a square equal in area to a given area