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There is only one nine-letter word beginning with HELIOSTAT

HELIOSTATheliostat n. A device that includes a plane mirror which turns so as to keep reflecting sunlight toward a predetermined…
HELIOSTAT n. an instrument using a mirror to reflect sunlight in a fixed direction, used for studying the sun or signalling messages.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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See this list for:

  • English Wiktionary: 1 word
  • Scrabble in French: 1 word
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: 1 word
  • Scrabble in Romanian: 1 word


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