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planetary

[plan-i-ter-ee] /ˈplæn ɪˌtɛr i/
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
1585-1595
1585-95; < Latin planētārius. See planet, -ary
Related forms
nonplanetary, adjective
Can be confused
planetary, plenary, plentiful, plenitude.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for nonplanetary

planetary

/ˈplænɪtərɪ; -trɪ/
adjective
1.
of or relating to a planet
2.
mundane; terrestrial
3.
wandering or erratic
4.
(astrology) under the influence of one of the planets
5.
(of a gear, esp an epicyclic gear) having an axis that rotates around that of another gear
6.
(of an electron) having an orbit around the nucleus of an atom
noun (pl) -taries
7.
a train of planetary gears
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for nonplanetary

planetary

adj.

1590s; see planet + -ary. Probably from Late Latin planetarius "pertaining to a planet or planets," but this is attested only as "an astrologer." Planetary nebula, so called for its shape, attested from 1785.

Online Etymology Dictionary, © 2010 Douglas Harper
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