geotropism
[jee-o-truh-piz-uh m]
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noun Biology.
oriented growth with respect to the force of gravity.
Origin of geotropism
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for geotropism
Historical Examples of 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 IICharles Darwin
No phenomenon of tropic movement appears so inexplicable as that of geotropism.
Life Movements in Plants, Volume II, 1919Sir Jagadis Chunder Bose
The root is thus supposed to be characterised by "positive" and the shoot by "negative" geotropism.
Life Movements in Plants, Volume II, 1919Sir Jagadis Chunder Bose
Hence an agent which acts on the organ from outside, induces phototropic change earlier than variation in geotropism.
Life Movements in Plants, Volume II, 1919Sir Jagadis Chunder Bose
geotropism
noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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geotropism
[jē-ŏt′rə-pĭz′əm]
The American Heritage® Science Dictionary
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