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单词 planetary
释义

WordReference Random House Learner's Dictionary of American English © 2024
plan•e•tar•y /ˈplænɪˌtɛri/USA pronunciation  adj. [before a noun]
  1. of or relating to planets:planetary orbits.

WordReference Random House Unabridged Dictionary of American English © 2024
plan•e•tar•y  (plan′i ter′ē),USA pronunciation adj. 
  1. Astronomyof, pertaining to, or resembling a planet or the planets.
  2. wandering;
    erratic.
  3. terrestrial;
    global.
  4. Mechanical Engineering[Mach.]noting or pertaining to an epicyclic gear train in which a sun gear is linked to one or more planet gears also engaging with an encircling ring gear.

n. 
  1. Mechanical Engineering[Mach.]a planetary gear train.
  • Latin planētārius. See planet, -ary
  • 1585–95

Collins Concise English Dictionary © HarperCollins Publishers::
planetary /ˈplænɪtərɪ -trɪ/ adj
  1. of or relating to a planet
  2. mundane; terrestrial
  3. wandering or erratic
  4. (of a gear, esp an epicyclic gear) having an axis that rotates around that of another gear
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更新时间：2025/7/23 6:52:35