phototropism
phototropic tendency or growth.
Origin of phototropism
1Words Nearby phototropism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
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
/ (ˌfəʊtəʊˈtrəʊpɪzəm) /
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, adjective
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 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 Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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