goniometer
/ˌgəʊnɪˈɒmɪtə(r)/noun
- an instrument for the precise measurement of angles, especially one used to measure the angles between the faces of crystals（用来精密测量角度, 尤指晶体面之间角度的）测角仪, 测角计。
派生词
goniometric
adjectivegoniometrical
adjectivegoniometry
noun词源
mid 18th cent.: from French goniomètre, from Greek gōnia 'angle' + French - mètre '(instrument) measuring'.