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phototropism
[ foh-to-truh-piz-uhm, foh-toh-troh-piz-uhm ]
/ foʊˈtɒ trəˌpɪz əm, ˌfoʊ toʊˈtroʊ pɪz əm /
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noun Botany.
phototropic tendency or growth.
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Words nearby phototropism
phototoxin, phototransistor, phototroph, phototrophic bacteria, phototropic, phototropism, phototropy, phototube, phototype, phototypeset, phototypesetting
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use phototropism in a sentence
Example of type A is found in the negative phototropism of the root of Sinapis.
Life Movements in Plants, Volume II, 1919|Sir Jagadis Chunder BoseThus the term phototropism means a turning or orientation brought about by means of light.
Being Well-Born|Michael F. Guyer
British Dictionary definitions for phototropism
phototropism
/ (ˌfəʊtəʊˈtrəʊpɪzəm) /
noun
the growth response of plant parts to the stimulus of light, producing a bending towards the light source
the response of animals to light; phototaxis
Derived forms of phototropism
phototropic, adjectiveCollins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Scientific definitions for phototropism
phototropism
[ fō-tŏt′rə-pĭz′əm ]
The growth or movement of a fixed organism toward or away from light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from the illuminated side to the darker side of the shoot, resulting in quicker growth on the darker side and bending of the shoot toward the source of light. Certain sessile invertebrates also exhibit phototropism.
The American Heritage® Science Dictionary
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