HELIOCHROMIC
He`li*o*chro"mic, a.
Defn: Pertaining to, or produced by, heliochromy.
HELIOCHROMY
He"li*o*chro`my, n.
Defn: The art of producing photographs in color.
HELIOGRAM
He"li*o*gram, n. [Helio- + -gram.]
Defn: A message transmitted by a heliograph.
HELIOGRAPH
He"li*o*graph, n. Etym: [Helio- + -graph.]
1. A picture taken by heliography; a photograph.
2. An instrument for taking photographs of the sun.
3. An apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3.