Protractor

·noun An adjustable pattern used by tailors.

II. Protractor ·noun One who, or that which, protracts, or causes protraction.

III. Protractor ·noun A muscle which extends an organ or part;

— opposed to retractor.

IV. Protractor ·noun An instrument formerly used in extracting foreign or offensive matter from a wound.

V. Protractor ·noun A mathematical instrument for laying down and measuring angles on paper, used in drawing or in plotting. It is of various forms, semicircular, rectangular, or circular.