geotropic

[jee-oh-trop-ik, -troh-pik]

adjective Biology.

of, relating to, or exhibiting geotropism.

Origin of geotropic

First recorded in 1870–75; geo- + -tropic

Related formsge·o·trop·i·cal·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for geotropic

Historical Examples of geotropic

The movement is primarily determined by the modifying influence of temperature on geotropic curvature.
Life Movements in Plants
Sir Jagadis Chunder Bose
The geotropic curvature was reduced to its minimum at the maximum temperature, and vice vers.
Life Movements in Plants
Sir Jagadis Chunder Bose
The procumbent stem curved up and attained a state of equilibrium under the action of geotropic stimulus.
Life Movements in Plants
Sir Jagadis Chunder Bose
Red light R, is ineffective, and geotropic torsion is restored.
Life Movements in Plants, Volume II, 1919
Sir Jagadis Chunder Bose
According to this test, the geotropic response of the stem is positive.
Life Movements in Plants, Volume II, 1919
Sir Jagadis Chunder Bose

geotropic in Science

geotropism

[jē-ŏt′rə-pĭz′əm]

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

Related formsgeotropic adjective (jē′ə-trō′pĭk, jē′ə-trŏp′ĭk)

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.