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HELIOGRAPH

Definition:an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
The word HELIOGRAPH scores 19 points in scrabble.

We have 11 clues for the answer HELIOGRAPH

Clue Answers
communication
247
flashing
21
Indication
565
INSTRUMENT for measuring
53
INSTRUMENT to measure intensity of sunlight
1
MEASURE intensity of sunlight, instrument to
1
MEASURING instrument
87
message
130
MESSAGE sent by reflecting sunlight in flashes from movable mirror
1
signaling device
2
SUNLIGHT-intensity measuring instrument
1
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