Dynactinometer

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Dynactinometer \Dy*nac`ti*nom"e*ter\, n. [Gr. ? power + E.
     actinometer.]
     An instrument for measuring the intensity of the photogenic
     (light-producing) rays, and computing the power of object
     glasses.
     [1913 Webster]