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1. An instrument for measuring angles.
2. An applicance for the assessment of labyrinthine disease. It consists of an adjustable surface on which the patient reclines. As the surface is gradually tilted, the angle at which the patient experiences loss of balance is noted.
3. A calibrated device designed to measure the arc or range of motion of a joint. Synonym(s): arthrometer, fleximeter, pronometer
4. Device used to measure the amount of head turn in strabismus or nystagmus.
[G. gōnia, angle, + metron, measure]


Materials science
A device used to detect the deformability or elasticity of a material.

Physical therapy
Goniometer, see there.