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heliotropism

 - 4 dictionary results
Heliotropism
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he⋅li⋅ot⋅ro⋅pism

  [hee-lee-o-truh-piz-uhm, hee-lee-uh-troh-piz-uhm]
Use heliotropism in a Sentence
–noun
heliotropic tendency or growth.
Origin:
1850–55; helio- + -tropism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Heliotropism
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he·li·ot·ro·pism   (hē'lē-ŏt'rə-pĭz'əm)   
n.  Growth or orientation of a sessile organism, especially a plant, toward or away from the light of the sun.
he'li·o·trop'ic (-ə-trŏp'ĭk) adj., he'li·o·trop'i·cal·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: he·li·ot·ro·pism
Pronunciation: "hE-lE-'ä-tr&-"piz-&m
Function: noun
: phototropism in which sunlight isthe orienting stimulus —he·lio·tro·pic /-lE-&-'trOp-ik, -'träp-/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Science Dictionary
heliotropism   (hē'lē-ŏt'rə-pĭz'əm)  Pronunciation Key 
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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