Spectroheliogram

1 definition found

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

  Spectroheliogram \Spec`tro*he"li*o*gram`\, n. [Spectrum + heloi-
     + -gram.] (Astrophysics)
     A photograph of the sun made by monochromatic light, usually
     of the calcium line (k), and showing the sun's faculae and
     prominences.
     [Webster 1913 Suppl.]