Adverb
torsionally (not comparable)
In terms of, or by means of, torsion.
torsionally flexible structural elements
Construction Skis have evolved from being constructed from solid wood to using a variety of materials including carbon- Kevlar to make skis stronger, torsionally stiffer, lighter, and more durable. Source: Internet
W. P. Mason, M. Hill: Measurement of the viscosity and shear elasticity of liquids by means of a torsionally vibrating crystal; Transactions of the ASME. Source: Internet