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单词 heliograph
释义

heliograph

/ˈhiːlɪəʊgrɑːf/
1
a signalling device by which sunlight is reflected in flashes from a movable mirror
日光反射信号器。
1.1
a message sent in such a way; a heliogram
日光反射信号。
2
a telescopic apparatus for photographing the sun
(拍摄太阳用的)(套筒式)太阳照相仪。
3
historical a type of early photographic engraving made using a sensitized silver plate and an asphalt or bitumen varnish
〈史〉日光胶版。
with obj.
1
dated send (a message) by heliograph
〈旧〉用日光反射信号器发送(信号)。
2
historical take a heliographic photograph of
〈旧〉用太阳照相仪拍摄。
派生词

heliographic

adjective

heliography

noun
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更新时间:2025/3/18 5:04:16