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