英语词汇rotator的起源、历史背景-英语词源词典

词汇	rotator
词源	rotator n. 1670s, "muscle which allows a part to be moved circularly," agent noun from Latin rotare "turn round, revolve" (see rotary). Also compare rotor. General mechanical sense of "one who or that which rotates" is by 1772. Related: Rotatory. Entries linking to rotator rotary adj. 1731, from Medieval Latin rotarius "pertaining to wheels," from Latin rota "a wheel, a potter's wheel; wheel for torture," from PIE root *ret- "to run, to turn, to roll" (source also of Sanskrit rathah "car, chariot;" Avestan ratho; Lithuanian ratas "wheel," ritu "I roll;" Old Irish roth, Welsh rhod "carriage wheel"). The root also forms the common West Germanic word for "wheel" (originally "spoked wheel"): Old High German rad, German Rad, Dutch rad, Old Frisian reth, Old Saxon rath. The international service club (founded by Paul P. Harris in Chicago in 1905) is so called from the practice of clubs entertaining in rotation. Hence Rotarian (1911). rotor n. 1873, an irregular shortening of rotator, originally in mathematics. Mechanical sense of "rotating part of a motor" is attested by 1903; specifically of helicopters from 1930. updated on October 03, 2021
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rotator n.