'Hypsometry' definitions:

Definition of 'hypsometry'

(from WordNet)
noun
Measurement of the elevation of land above sea level [syn: hypsometry, hypsography]

Definition of 'Hypsometry'

From: GCIDE
  • Hypsometry \Hyp*som"e*try\, n. That branch of the science of geodesy which has to do with the measurement of heights, either absolutely with reference to the sea level, or relatively. [1913 Webster]