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tropotaxis

[trop-uh-tak-sis, troh-puh-]
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noun Zoology.
  1. 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.
Compare klinotaxis.

Origin of tropotaxis

First recorded in 1930–35; tropo- + -taxis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018