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单词 heliography
释义

WordReference Random House Unabridged Dictionary of American English © 2024
he•li•o•graph  (hēlē ə graf′, -gräf′),USA pronunciation n. 
  1. Opticsa device for signaling by means of a movable mirror that reflects beams of light, esp. sunlight, to a distance.
  2. Astronomyphotoheliograph.
  3. Meteorologyan instrument for recording the duration and intensity of sunshine.
  4. Photography, Printingan early type of photoengraving made on a metal plate coated with sensitized asphalt.

v.t., v.i. 
  1. to communicate by heliograph.
  • 1815–25; helio- + -graph
he•li•og•ra•pher  (hē′lē ogrə fər),USA pronunciation n.  he•li•o•graph•ic  (hē′lē ə grafik),USA pronunciation he′li•o•graphi•cal, adj.  he′li•o•graphi•cal•ly, adv. 
he′li•ogra•phy, n. 

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