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planetary

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Planetary
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plan⋅e⋅tar⋅y

  [plan-i-ter-ee]
Use planetary in a Sentence
–adjective
1. of, pertaining to, or resembling a planet or the planets.
2. wandering; erratic.
3. terrestrial; global.
4. Machinery. 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.
–noun
5. Machinery. a planetary gear train.
Origin:
1585–95; < L planētārius. See planet, -ary
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Planetary
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plan·e·tar·y   (plān'ĭ-těr'ē)   
adj.  

  1. Of, relating to, or resembling the physical or orbital characteristics of a planet or the planets.

    1. Of or relating to the earth; terrestrial or earthly: measured the planetary tilt in degrees.

    2. Of or affecting the entire world; global: a planetary consensus.

  3. Wandering; erratic: a planetary life.

  4. Being or relating to a gear train consisting of a central gear with an internal ring gear and one or more pinions.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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