spectroheliogram
Spec`tro*he"li*o*gram`, n. [Spectrum + heloi- + -gram.] (Astrophysics) Defn: A photograph of the sun made by monochromatic light, usually of the calcium line (k), and showing the sun's faculæ and prominences.
Spec`tro*he"li*o*gram`, n. [Spectrum + heloi- + -gram.] (Astrophysics) Defn: A photograph of the sun made by monochromatic light, usually of the calcium line (k), and showing the sun's faculæ and prominences.