torsionometer

tor·sion·om·e·ter

(tōr'shŭn-om'ĕ-tĕr),
A device for measuring the degree of rotation of the spinal column.

torsionometer

(tor″shŭn-ŏm′ĕ-tĕr) [″ + Gr. metron, measure]
1. A device for measuring the rotation of the vertebral column around the long axis using radiographs of the spine.
2. A subjective test used in ophthalmology for measuring the rotation of vertical meridians of the eyes.