— heliographer /hee'lee og"reuh feuhr/ , n. — heliographic /hee'lee euh graf"ik/ , heliographical , adj. — heliographically , adv. — heliography , n.
/hee"lee euh graf', -grahf'/ , n.
1. a device for signaling by means of a movable mirror that reflects beams of light, esp. sunlight, to a distance.
2. Astron. photoheliograph.
3. Meteorol. an instrument for recording the duration and intensity of sunshine.
4. Photog. , Print. an early type of photoengraving made on a metal plate coated with sensitized asphalt.
v.t. , v.i.
5. to communicate by heliograph.
[ 1815-25; HELIO- + -GRAPH ]