- oriented growth with respect to the force of gravity.
Origin of geotropism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for geotropism
Geotropism is a specific subject in the physiology of plants.
Thus I am now observing something about geotropism, and I had no idea a few weeks ago that this would have been necessary.More Letters of Charles Darwin Volume II
No phenomenon of tropic movement appears so inexplicable as that of geotropism.
The root is thus supposed to be characterised by "positive" and the shoot by "negative" geotropism.
Hence an agent which acts on the organ from outside, induces phototropic change earlier than variation in geotropism.
- the response of a plant part to the stimulus of gravity. Plant stems, which grow upwards irrespective of the position in which they are placed, show negative geotropism
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 geotropism
Online Etymology Dictionary, © 2010 Douglas Harper
- The directional growth of an organism in response to gravity. Roots display positive geotropism when they grow downwards, while shoots display negative geotropism when they grow upwards. Also called gravitropism
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