'Spherometer' definitions:

Definition of 'spherometer'

(from WordNet)
noun
A measuring instrument for measuring the curvature of a surface

Definition of 'Spherometer'

From: GCIDE
  • Spherometer \Sphe*rom"e*ter\, n. [Sphere + -meter: cf. F. sph['e]rom[`e]tre.] (Physics) An instrument for measuring the curvature of spherical surface, as of lenses for telescope, etc. [1913 Webster]