A Protractor

1 One who, or that which, protracts, or causes protraction.<p>2 A circular or semicircular tool for drawing or measuring angles.</p><p>3 (surgery) An instrument formerly used in extracting foreign or offensive matter from a wound.</p><p>4 (anatomy) A muscle that extends an organ or part; opposed to retractor.</p><p>5 An adjustable pattern used by tailors.</p>