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spherometer

Noun

sphe=rom=e=ter

WORDNET DICTIONARY

spherometer(n = noun.artifact) - a measuring instrument for measuring the curvature of a surface;

spherometer, n. [Sphere + -meter: cf. F. sphéromètre.].

An instrument for measuring the curvature of spherical surface, as of lenses for telescope, etc. [1913 Webster]

spherometer, n. an instrument for finding the radius of a sphere and for the exact measurement of the thickness of small bodies.

Etymology

F sph{eacute}rom{egrave}tre (as SPHERE, -METER)

For further exploring for "spherometer" in Webster Dictionary Online