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The Collaborative International Dictionary
Aerometry

Aerometry \A`["e]r*om"e*try\, n. [A["e]ro- + -metry: cf. F. The science of measuring the air, including the doctrine of its pressure, elasticity, rarefaction, and condensation; pneumatics.

Wiktionary
aerometry

n. The science of measure the air, including its pressure, rarefaction, and condensation; pneumatics.