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paratonic
/ ˌpærəˈtɒnɪk /
adjective
- botany (of a plant movement) occurring in response to an external stimulus
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Example Sentences
The change in torsion is, moreover, determined in reference to the paratonic action of incident geotropic stimulus.
From Project Gutenberg
I find that this autonomous movement becomes modified or even arrested by the paratonic effect of light.
From Project Gutenberg
I have already referred to the distinction that is made between nastic and paratonic movements.
From Project Gutenberg
They are mostly reflex or paratonic, and due to external stimuli.
From Project Gutenberg
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