Meaning of heliograph

he•li•o•graph

Pronunciation: (hē'lē-u-graf", -gräf"), [key]
— n.
  1. a device for signaling by means of a movable mirror that reflects beams of light, esp. sunlight, to a distance.
  2. photoheliograph.
  3. an instrument for recording the duration and intensity of sunshine.
  4. an early type of photoengraving made on a metal plate coated with sensitized asphalt.
—v.t., v.i.
  1. to communicate by heliograph.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also: