A circular or semicircular tool for drawing or measuring angles.
A muscle that extends an organ or part; opposed to retractor.
One who, or that which, protracts, or causes protraction.
An instrument formerly used in extracting foreign or offensive matter from a wound.
An adjustable pattern used by tailors.
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.