heliotropism
heliotropic tendency or growth.
Origin of heliotropism
1Words Nearby heliotropism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use heliotropism in a sentence
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 | Ernst HaeckelThis 'midday sleep' has been termed para-heliotropism by Darwin.
Life Movements in Plants, Volume II, 1919 | Sir Jagadis Chunder BoseWe notice also the reverse phenomenon, namely, that chemical changes produced in the animal destroy its heliotropism.
Darwin and Modern Science | A.C. Seward and OthersThese periodic motions are determined to a large extent, if not exclusively, by the heliotropism of these animals.
Darwin and Modern Science | A.C. Seward and OthersThis problem reduces itself simply to that of the method whereby the gametes transmit heliotropism to the larvae or to the adult.
Darwin and Modern Science | A.C. Seward and Others
British Dictionary definitions for heliotropism
/ (ˌhiːlɪˈɒtrəˌpɪzəm) /
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 of heliotropism
- heliotropic (ˌhiːlɪəʊˈtrɒpɪk), adjective
- heliotropically, adverb
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
Scientific definitions for 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.
Other words from heliotropism
- heliotropic adjective (hēl′lē-ə-trō′pĭk, -trŏp′ĭk)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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