protractor的词源

英文词源

protractor (n.)

1610s, "one who lengthens (an action)," from Medieval Latin protractor, agent noun from Latin protrahere "to draw forward" (see protraction); sense of "instrument for drawing angles" first recorded 1650s.

中文词源

protractor：量角器，分度规

来自protract,拖延，延长。

该词的英语词源请访问找单词词源英文版：protractor 词源，protractor 含义。