goniometer noun. [gǝʊnɪ'ɒmɪtǝ] M18.
[French goniomètre, from Greek gōnia angle: see -METER.]
Any of various instruments used for the measurement of angles, as in surveying, crystallography, radio direction-finding, medicine (e.g. in the study of joints, and of balance), etc.

■ gonio'metric,

■ gonio'metrical adjectives of or pertaining to goniometry M19.

■ goniometry noun the measurement of angles E19.

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