spherometer

English

A common type of spherometer

Etymology

sphero- +‎ -meter.

Noun

spherometer (plural spherometers)

(optics) A device used to measure the curvature of a surface, such as a lens.
More precisely, a spherometer directly measures a sagitta (distance between a point and a chord), allowing the radius of curvature to be calculated.

Translations

measuring device

Catalan: esferòmetre m
Galician: esferómetro m
Italian: sferometro m
Malay: sferometer
Portuguese: esferómetro m (Portugal), esferômetro m (Brazil)
Spanish: esferómetro (es) m

Spherometer in the Encyclopædia Britannica (11th edition, 1911)

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