Pyrheliometer

1 definition found

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

  Pyrheliometer \Pyr*he`li*om"e*ter\, n. [Gr. ? fire + ? sun +
     -meter.] (Physics)
     An instrument for measuring the direct heating effect of the
     sun's rays.
     [1913 Webster]