Daily Almanac for
Nov 28, 2009
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tro•pism



Pronunciation: (trō'piz-um), [key]
—n. Biol.
an orientation of an organism to an external stimulus, as light, esp. by growth rather than by movement.

-tropism




var. of -tropy.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

tropinetropo-
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