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Ancient Greek δασύ(ς) (dasú(s), dense) +‎ -meter (measuring device).


dasymeter (plural dasymeters)

  1. An instrument for testing the density of gases, consisting of a thin glass globe, which is weighed in the gas or gases, and then in an atmosphere of known density.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for dasymeter in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)