| 释义 |
he·li·og·ra·phy
\ˌhēlēˈägrəfē\ noun
(-es)
1. [French héliographie, from hélio- heli- (I) + -graphie -graphy] : an early photographic process producing a photoengraving on a metal plate coated with an asphalt preparation; broadly : photography
2. [heli- (I) + -graphy] : the system, art, or practice of signaling with a heliograph |