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helio- +‎ -metry


heliometry (uncountable)

  1. The measurement of the diameters of heavenly bodies, their relative distances, etc.

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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 The imported definitions may be significantly out of date, and any more recent senses may be completely missing.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 heliometry in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)