Examples from the Web for paratonic
The change in torsion is, moreover, determined in reference to the paratonic action of incident geotropic stimulus.
They are mostly reflex or paratonic, and due to external stimuli.The Wonders of Life|Ernst Haeckel
I find that this autonomous movement becomes modified or even arrested by the paratonic effect of light.
I have already referred to the distinction that is made between nastic and paratonic movements.