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Webster 1913 Edition

Noun.

[

Stereo-

-metry

: cf. F.

stéréométrie

The art of measuring and computing the cubical contents of bodies and figures; – distinguished from planimetry.

Noun.

[Gr., firm, fixed; to measure.] The art of measuring solid bodies, and finding their solid content.

stereometry ‎(uncountable)

(now rare) The science of measuring the volume of solids or solid bodies.
- 1621, Robert Burton, The Anatomy of Melancholy, New York 2001, p.106:
  from measures known it is an easy matter to rectify weights, etc., to cast up all, and resolve bodies by algebra, stereometry.

science of measuring solids