1
[ noun ] the area enclosed by two perpendicular radii of a circle

Related terms

area

2
[ noun ] any of the four areas into which a plane is divided by two orthogonal coordinate axes

Related terms

area

3
[ noun ] a quarter of the circumference of a circle

Synonyms

quarter-circle

Related terms

line

4
[ noun ] a quarter of the circumference of a circle

Synonyms

right_angle

5
[ noun ] a measuring instrument for measuring altitude of heavenly bodies

Related terms

measuring_instrument

*