geotropism

noun

ge·​ot·​ro·​pism jē-ˈä-trə-ˌpi-zəm How to pronounce geotropism (audio)
: a tropism (as of plant roots or shoots) in which gravity is the orienting factor : gravitropism
Exactly how roots perceive and transduce gravity has not yet been fully explained, which is surprising because root geotropism has been investigated for more than 100 years.Lewis J. Feldman

Word History

Etymology

borrowed from German Geotropismus, from geo- geo- + -tropismus -tropism

Note: The term was introduced by the German botanist and plant physiologist Albert Bernhard Frank (1839-1900) in Beiträge zur Pflanzenphysiologie (Leipzig, 1868), p. 85.

First Known Use

1873, in the meaning defined above

Time Traveler
The first known use of geotropism was in 1873

Dictionary Entries Near geotropism

Cite this Entry

“Geotropism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geotropism. Accessed 27 Feb. 2024.

Kids Definition

geotropism

noun
ge·​ot·​ro·​pism jē-ˈä-trə-ˌpiz-əm How to pronounce geotropism (audio)
: a tropism involving turning or movement toward the earth
geotropic
ˌjē-ə-ˈtrō-pik
-ˈträp-ik
adjective

Medical Definition

geotropism

noun
ge·​ot·​ro·​pism jē-ˈä-trə-ˌpiz-əm How to pronounce geotropism (audio)
: a tropism in which gravity is the orienting factor
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