[ ˌgəʊnɪ'ɒmɪtə ]
■ noun an instrument for the precise measurement of angles, especially the angles between the faces of crystals.
Derivatives
goniometric adjective
goniometrical adjective
goniometry noun
Origin
C18: from Fr. goniomètre , from Gk gōnia 'angle' + Fr. -mètre '(instrument) measuring'.