he·li·o·cen·tric

[hee-lee-oh-sen-trik]
adjective Astronomy.
1.
measured or considered as being seen from the center of the sun.
2.
having or representing the sun as a center: the heliocentric concept of the universe.

Origin:
1660–70; helio- + -centric

he·li·o·cen·tri·cal·ly, adverb
he·li·o·cen·tric·i·ty [hee-lee-oh-sen-tris-i-tee] , he·li·o·cen·tri·cism [hee-lee-oh-sen-truh-siz-uhm] , noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Heliocentric is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
Collins
World English Dictionary
heliocentric (ˌhiːlɪəʊˈsɛntrɪk) [Click for IPA pronunciation guide]
 
adj
1.  having the sun at its centre
2.  measured from or in relation to the centre of the sun
 
helio'centrically
 
adv
 
heliocen'tricity
 
n
 
helio'centricism
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
heliocentric   (hē'lē-ō-sěn'trĭk)  Pronunciation Key 
  1. Relating to or measured from the center of the Sun.

  2. Relating to a model of the solar system or universe having the Sun as the center. Compare geocentric. See Note at Copernicus.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Neither does atomic theory of matter, the heliocentric model of the solar system, or plate tectonics.
The truth of its wrongness is as well taken as the truth of the heliocentric solar system.
It took some time to begin to understand the motion of the planets against the sky and how the solar system was heliocentric.
Note that the heliocentric orbit energy is constant until a near encounter with a planet occurs.
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