One fourth of a circle or disc; a sector with an angle of 90°.
One of the four regions of the Cartesian plane bounded by the x-axis and y-axis.
A measuring device with a graduated arc of 90° used in locating an altitude.
One of the four categories of team wins and losses, as categorized by strength of schedule.
One of the four sections made by dividing an area with two perpendicular lines.
Something that is four times the usual number, amount, size, etc.
A figure-skating jump with four revolutions in the air.
Being four times as long, as big or as many of something.
To multiply by four.
To increase by a factor of four.
To provide four parallel running lines on a given stretch of railway.