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the movement of an animal in response to stimuli received simultaneously from two separate sense organs
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
trop•o•tax•is(ˌtrɒp əˈtæk sɪs, ˌtroʊ pə-)
straight movement by an organism toward or away from a source of stimulation as a result of comparing information received by paired sensory receptors on both sides of the body.
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