geotaxis(redirected from geotactical)
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taxis in response to gravity; movement 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
Movement of a motile organism using the earth's gravity for orientation.
ge′o·tac′tic (-tĭk) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
geotaxisa type of animal movement (not growth) in which the body becomes orientated in relation to the force of gravity. For example, fruit flies exhibit negative geotaxis, moving upwards in the culture bottle, away from the gravitational force.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005