[ˈkwɒdr(ə)nt], (Noun)

Definitions:
- each of four quarters of a circle.

- an instrument used for taking angular measurements of altitude in astronomy and navigation, typically consisting of a graduated quarter circle and a sighting mechanism.

- a frame fixed to the head of a ship's rudder, to which the steering mechanism is attached.


Phrases:

Origin:
late Middle English (denoting the astronomical instrument): from Latin quadrans, quadrant- ‘quarter’, from quattuor ‘four’