actinic balance

1 definition found

actinic balance - Collaborative International Dictionary of English v.0.48 :

  Bolometer \Bo*lom"e*ter\, n. [Gr. ? a stroke, ray + -meter.]
     (Physics)
     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.
     [1913 Webster]