- Machinery. a planetary gear train.
Origin of planetary
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for planetary
Some of those plans for planetary defense sound like they were ripped right out of a Michael Bay movie.U.S.—Russia Tensions Nuke Plans For Real-Life ‘Armageddon’ Asteroid Defense
August 4, 2014
The leading neocons competed with each other to come up with the most grandiose vision of Middle East and planetary restructuring.Oliver Stone and Peter Kuznick On How Obama Should Handle the Crisis In Syria
Oliver Stone, Peter Kuznick
October 15, 2013
Higher incomes lead to greater demand on planetary resources and more interdependence.Big Idea: The Time for Divided Nations Is Over
August 1, 2013
“The Martian Chroniclers”Burkhard Bilger, The New Yorker A new era in planetary exploration.The Week’s Best Longreads for April 20, 2013
April 20, 2013
The Daily Pic: Michael Benson's planetary art hovers between sci-fi and astronomy.Isaac Asimov or Carl Sagan?
February 11, 2013
You get in touch with planetary health services immediately!Pariah Planet
The planetary president, Wilcox, is in alliance with the war party.
The planetary rulers had taken no chances of tampering with their propaganda.
I see sir, that you are most apt in the calculation of the planetary hours.The Memoires of Casanova, Complete
Jacques Casanova de Seingalt
But there are hundreds of planetary bodies now known that were then not known.The Book of the Damned
- of or relating to a planet
- mundane; terrestrial
- wandering or erratic
- astrology under the influence of one of the planets
- (of a gear, esp an epicyclic gear) having an axis that rotates around that of another gear
- (of an electron) having an orbit around the nucleus of an atom
- a train of planetary gears
Word Origin and History for planetary
Online Etymology Dictionary, © 2010 Douglas Harper
- In the traditional model of solar systems, a celestial body larger than an asteroid or comet, illuminated by light from a star, such as the Sun, around which it revolves.
- A celestial body that orbits the Sun, has sufficient mass to assume nearly a round shape, clears out dust and debris from the neighborhood around its orbit, and is not a satellite of another planet. The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto was considered to be a planet until its reclassification in 2006 as a dwarf planet. A planetlike body with more than about ten times the mass of Jupiter would be considered a brown dwarf rather than a planet. See also extrasolar planet inner planet outer planet.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.