| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024he•li•o•graph (hē′lē ə graf′, -gräf′),USA pronunciation n. - Opticsa device for signaling by means of a movable mirror that reflects beams of light, esp. sunlight, to a distance.
- Astronomyphotoheliograph.
- Meteorologyan instrument for recording the duration and intensity of sunshine.
- Photography, Printingan early type of photoengraving made on a metal plate coated with sensitized asphalt.
v.t., v.i. - to communicate by heliograph.
he•li•og•ra•pher (hē′lē og′rə fər),USA pronunciation n. he•li•o•graph•ic (hē′lē ə graf′ik),USA pronunciation he′li•o•graph′i•cal, adj. he′li•o•graph′i•cal•ly, adv. he′li•og′ra•phy, n. |