protractor

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noun pro·trac·tor \-ˈtrak-tər\

Definition of protractor

  1. 1a :  one that protractsb :  a muscle that extends a part

  2. 2 :  an instrument for laying down and measuring angles in drawing and plotting

Circa 1611

First Known Use of protractor

circa 1611


PROTRACTOR Defined for English Language Learners

protractor

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noun

Definition of protractor for English Language Learners

  • : a device that has the form of a half circle and that is used for drawing and measuring angles


PROTRACTOR Defined for Kids

protractor

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noun pro·trac·tor \prō-ˈtrak-tər\

Definition of protractor for Students

  1. :  an instrument used for drawing and measuring angles


Medical Dictionary

protractor

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noun pro·trac·tor \-tər\

Medical Definition of protractor

  1. :  a muscle that extends a part—compare retractor b



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