Definition of "thigmotropism" []

• The turning or bending response of an organism upon direct contact with a solid surface or object. Also called stereotropism. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "What are the advantages of thigmotropism to climbing plants? if a tree falls in a forest, and no one is near it, does it make a sound?"