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[jee-oh-trop-ik, -troh-pik] /ˌdʒi oʊˈtrɒp ɪk, -ˈtroʊ pɪk/
adjective, Biology.
of, relating to, or exhibiting geotropism.
Origin of geotropic
First recorded in 1870-75; geo- + -tropic
Related forms
geotropically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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geotropic in Science
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.

geotropic adjective (jē'ə-trō'pĭk, jē'ə-trŏp'ĭk)
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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