SINCE 1828
diatropism
noun
di·at·ro·pism
| \ dīˈa‧trəˌpizəm\
plural -s
Definition of diatropism
: the tropistic tendency of certain plant organs to place themselves transversely to the line of action of a stimulus — compare diageotropism, diaphototropism
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Merriam-Webster unabridged
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