protractor

n. 拖延者, 分度器, 牵引肌, 钳取器 [医] 取钳器

发音

其它 /pɹəˈtɹæktə(ɹ)/

词形变化

protractors 复数 protractors

别名

protracter

释义与例句

n.
  1. 1.

    One who, or that which, protracts, or causes protraction.

  2. 2.

    A circular or semicircular tool for drawing or measuring angles.

    量角器

  3. 3.

    An instrument formerly used in extracting foreign or offensive matter from a wound.

    医学
  4. 4.

    A muscle that extends an organ or part; opposed to retractor.

    医学
  5. 5.

    An adjustable pattern used by tailors.

词源

From protract + -or.

来源：wiktionary