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heliotropic

[hee-lee-uh-trop-ik, -troh-pik] /ˌhi li əˈtrɒp ɪk, -ˈtroʊ pɪk/
adjective, Biology
1.
turning or growing toward the light.
Origin
1870-1875
1870-75; helio- + -tropic
Related forms
heliotropically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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heliotropic in Science
heliotropism
  (hē'lē-ŏt'rə-pĭz'əm)   
The growth or movement of a fixed organism, especially a plant, toward or away from sunlight. Heliotropism can be easily seen in sunflowers, which slowly turn their large flowers so that they continually face the sun.

heliotropic adjective (hēl'lē-ə-trō'pĭk, -trŏp'ĭk)
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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