he·lio·graph /-ˌgræf/
照相製版,太陽攝影機,日光儀(vt.)(vi.)用太陽攝影機拍攝,用日光儀傳遞
heliograph
日光反射信號器
He·li·o·graph n.
1. A picture taken by heliography; a photograph.
2. An instrument for taking photographs of the sun.
3. An apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3.
He·li·o·graph v. t.
1. To telegraph, or signal, with a heliograph.
2. To photograph by sunlight.
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heliograph
n : an apparatus for sending telegraphic messages by using a
mirror to turn the sun's rays off and on
v : signal by means of a mirror and the using the sun's rays