protractor

名词 n.
中文释义

英文释义

名词 n.
  1. One who, or that which, protracts, or causes protraction.
  2. A circular or semicircular tool for drawing or measuring angles.
    — Use a protractor to measure the angle accurately.
  3. An instrument formerly used in extracting foreign or offensive matter from a wound.
  4. A muscle that extends an organ or part; opposed to retractor.
  5. An adjustable pattern used by tailors.

词形变化

protractors plural

词汇关系

上位词
goniometer angle measurer

词源

Etymology tree
English protract
English -or
English protractor
From protract + -or.
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