heliotropism [hee-lee- o-tr uh-piz- uh m, hee-lee- uh- troh-piz- uh m] EXAMPLES | WORD ORIGIN noun heliotropic tendency or growth.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for heliotropism Historical Examples of heliotropism
heliotropism of animals is identical with the heliotropism of plants.
We have mentioned the newly hatched larv of the barnacle in connection with
If it acts in a one-sided way, it causes the particular form of stimulation which we call phototaxis or
We notice also the reverse phenomenon, namely, that chemical changes produced in the animal destroy its
These periodic motions are determined to a large extent, if not exclusively, by the
heliotropism of these animals. British Dictionary definitions for heliotropism noun the growth of plants or plant parts (esp flowers) in response to the stimulus of sunlight, so that they turn to face the sun Derived Forms heliotropic ( ˌhiːlɪəʊˈtrɒpɪk), adjective heliotropically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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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. Related forms heliotropic adjective ( hēl′lē-ə-trō) ′pĭk, -trŏp ′ĭk
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