'Spectroheliogram' definitions:

Definition of 'Spectroheliogram'

From: 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.]