heliograph
[ hee-lee-uh-graf, -grahf ]
/ ˈhi li əˌgræf, -ˌgrɑf /
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noun
a device for signaling by means of a movable mirror that reflects beams of light, especially sunlight, to a distance.
Astronomy. photoheliograph.
Meteorology. an instrument for recording the duration and intensity of sunshine.
Photography, Printing. an early type of photoengraving made on a metal plate coated with sensitized asphalt.
verb (used with or without object)
to communicate by heliograph.
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OTHER WORDS FROM heliograph
he·li·og·ra·pher [hee-lee-og-ruh-fer], /ˌhi liˈɒg rə fər/, nounhe·li·o·graph·ic [hee-lee-uh-graf-ik], /ˌhi li əˈgræf ɪk/, he·li·o·graph·i·cal, adjectivehe·li·o·graph·i·cal·ly, adverbhe·li·og·ra·phy, nounWords nearby heliograph
heliocentric parallax, Heliochrome, heliodor, Heliogabalus, heliogram, heliograph, heliogravure, heliolatry, heliolithic, heliometer, heliopause
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for heliograph
British Dictionary definitions for heliograph
heliograph
/ (ˈhiːlɪəʊˌɡrɑːf, -ˌɡræf) /
noun
an instrument with mirrors and a shutter used for sending messages in Morse code by reflecting the sun's rays
a device used to photograph the sun
Derived forms of heliograph
heliographer (ˌhiːlɪˈɒɡrəfə), nounheliographic (ˌhiːlɪəʊˈɡræfɪk) or heliographical, adjectiveheliography, nounCollins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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