(noun) A semicircularinstrument for measuring and constructing angles.
(noun)Anadjustablepatternused by tailors.
(noun)Anatomy A muscle that extends a limb or otherpart.
Use "protractor" in a sentence
"That is, hold the protractor, which is "D" shaped, in the same orientation as the letter "D"."
"-- As all angles are not obtainable by the square or bevel, a protractor is a most desirable addition to the stock of tools."
"A 14-year-old Naples High School student faces felony charges of aggravated battery for allegedly attacking another teen at the Coastland Center mall with an instrument described as a protractor or compass."