- quadrant, right angle - a quarter of the circumference of a circle
--1 is a kind of angular unit
--1 is a part of straight angle
--1 has parts: degree, arcdegree; grad, grade; oxtant - quadrant, quarter-circle - a quarter of the circumference of a circle
--2 is a kind of line
- quadrant - any of the four areas into which a plane is divided by two orthogonal coordinate axes
--3 is a kind of area, country
- quadrant - the area enclosed by two perpendicular radii of a circle
--4 is a kind of area, country
- quadrant - a measuring instrument for measuring altitude of heavenly bodies
--5 is a kind of measuring instrument, measuring system, measuring device
- quadrant - the area enclosed by two perpendicular radii of a circle