1. The quarter of a circle, or an arc of 90; an instrument for taking altitudes; an instrument used for elevating cannon. Quadrant of altitude, a thin pliable strip of brass belonging to an artificial globe.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• qudrant,
• quatrant,
• quadren,
• quadrent,
• quaderant,
• quadrens,
• quandrant,
• quaranty,
• guarrant,
• quadrat,
• quadrents,
• quatrans,
• quadrands,
• quadranate,
• quardrants,
• quadarant,
• guarant,
• quadrqant,
• quardrant,
• quadrint

• quadroon,
• quatrain,
• quadrangle.

The adjective form of the word "quadrant" is "quadrantal".

The plural of the "quadrant" can be the "quadrants".

The singular of the "quadrant" can be the "quadrant".