heliograph 1
noundomain: artefact
Princeton WordNet [ver.3.1]
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EnglishDefinition
an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
Hypernym
apparatus 1
noun
equipment designed to serve a specific function
EnglishDerivationally related form
heliograph 1
verb
signal by means of a mirror and the using the sun's rays
