Bolometer
Pronunciation : Bo*lom"e*ter
Part of Speech : n.
Etymology : [Gr. a stroke, ray + -meter.] (Physics)
Definition : Defn: An instrument for measuring minute quantities of radiant heat, especially in different parts of the spectrum; -- called also actinic balance, thermic balance. S. P. Langley.
Source : Webster's Unabridged Dictionary, 1913