orthotropism Hear it!

orthotropism definition

or·thot·ro·pism (ôr t̸hä′trə piz′əm)

noun

growth, or a tendency to grow, in a vertical direction or position

Etymology: ortho- + -tropism

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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