[hee-lee-o-truh-piz-uh m, hee-lee-uh-troh-piz-uh m]
- heliotropic tendency or growth.
Origin of heliotropism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for heliotropism
The heliotropism of animals is identical with the heliotropism of plants.
We have mentioned the newly hatched larv of the barnacle in connection with heliotropism.The Organism as a Whole
If it acts in a one-sided way, it causes the particular form of stimulation which we call phototaxis or heliotropism.The Wonders of Life
We notice also the reverse phenomenon, namely, that chemical changes produced in the animal destroy its heliotropism.
These periodic motions are determined to a large extent, if not exclusively, by the heliotropism of these animals.
- the growth of plants or plant parts (esp flowers) in response to the stimulus of sunlight, so that they turn to face the sun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for heliotropism
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.
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