dynactinometer

English

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Etymology

From Ancient Greek δύναμις (dúnamis, “force”) + actino- +‎ -meter.

Noun

dynactinometer (plural dynactinometers)

An instrument for measuring the intensity of photogenic rays and computing the power of object glasses.

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 The imported definitions may be significantly out of date, and any more recent senses may be completely missing.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 “dynactinometer”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)