quadrante -
n. 1 a quarter of a circle's circumference.
2 a plane figure enclosed by two radii of a circle at right angles and the arc cut off by them.
3 a quarter of a sphere etc.
4 a a thing, esp. a graduated strip of
metal, shaped like a quarter-circle. b an instrument graduated (esp.
through an arc of 90ш) for taking angular measurements.
quadrantal adj. [ME f. L quadrans -antis quarter f. quattuor four]