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plan•e•tar•y



Pronunciation: (plan'i-ter"ē), [key]
adj.
1. of, pertaining to, or resembling a planet or the planets.
2. wandering; erratic.
3. terrestrial; global.
4. 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.
Mach.a planetary gear train.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

planetariumplanetary nebula
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