stereometry

from The Collaborative International Dictionary of English v.0.48

Stereometry \Ste`re*om"e*try\, n. [Stereo- + -metry: cf. F.
   st['e]r['e]om['e]trie.]
   The art of measuring and computing the cubical contents of
   bodies and figures; -- distinguished from planimetry.
   [1913 Webster]