An instrument for the precise measurement of angles, especially one used to measure the angles between the faces of crystals.
- ‘Measuring the femoral tibial angle with a goniometer is a more accurate way to quantify angulation.’
- ‘Range of motion was measured with a goniometer, and the side-to-side differences for extension and flexion were calculated.’
- ‘Angular resolved spectra of surface samples were obtained using a homemade goniometer.’
- ‘We constructed a goniometer to measure angularly resolved light scattering.’
- ‘On the photograph that was later printed, lines were drawn between the markers and the horizontal floor to create intersecting lines that could be measured by a goniometer.’
Mid 18th century: from French goniomètre, from Greek gōnia angle + French -mètre (instrument) measuring.