By the stimulus of a blow there is produced a torsional vibration—a response followed by recovery.
torsional movement of leaflet of Cassia alata: Experiment 152.
A dorsiventral organ, moreover, exhibits a torsional movement under lateral stimulus of gravity.
Vanadium is used mainly in steel, to which it gives great toughness and torsional strength.
The torsional record is, to all intents and purposes, a replica of the record of periodic up and down movements of the leaf.
So also with the torsional vibrations of plants, I find response depending on the quickness with which the vibration is effected.
The molecular model consists of a torsional pendulum—a wire with a dependent sphere.
The handle, by which a torsional vibration is imparted to the wire, may be slipped over either electrode.
Attention must be called to the rapid increase in the torsional rigidity of these threads as the temperature rises.
H, thin glass hook: A, aluminium wire attached to petiole for magnification of torsional movement.
early 15c., "wringing pain in the bowels," from Old French torsion (early 14c.), from Late Latin torsionem (nominative torsio) "a wringing or gripping," from Latin tortionem (nominative tortio) "torture, torment," noun of action from past participle stem of torquere "to twist" (see thwart). Meaning "action or process of twisting as by opposing forces" is first recorded 1540s.
torsion tor·sion (tôr'shən)
A twisting or rotation of a part on its long axis.
Twisting of the cut end of an artery to arrest hemorrhage.
Ocular rotation around the anteroposterior axis.