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tropism in response to gravity, i.e., either toward or away from the earth; growth influenced by gravity.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
A form of positive barotaxis in which there is a tendency to growth or movement toward or into the earth.
[geo- + G. taxis, orderly arrangement]
Farlex Partner Medical Dictionary © Farlex 2012
ge′o·tro′pic (jē′ə-trō′pĭk) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
geotropism) a plant growth movement that occurs in response to gravity. Thus roots are positively gravitropic (growing downwards), while shoots are generally negatively gravitropic (growing upwards).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005