- an instrument for measuring or drawing angles on paper, usually a flat semicircular transparent plastic sheet graduated in degrees
- a former term for extensor
单词 | protractor |
释义 | WordReference Random House Learner's Dictionary of American English © 2024 pro•trac•tor /proʊˈtræktɚ, prə-/USA pronunciation n. [countable] WordReference Random House Unabridged Dictionary of American English © 2024
pro•trac•tor (prō trak′tər, prə-),USA pronunciation n.
Collins Concise English Dictionary © HarperCollins Publishers:: protractor /prəˈtræktə/ n
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