"Pyrostat" validity in different word game dictionaries

Dictionary Validity
Scrabble US(US/Canada/Thailand - TWL/NWL) Yes
Scrabble UK(International - SOWPODS/CSW) Yes
Words with Friends(WWF) Yes

"pyrostat" Definition

  1. any of various automatic devices that when exposed to heat, light, smoke, or some other manifestation of fire actuate a mechanism for giving a warning or for setting in operation a means of extinguishing such a fire— compare THERMOSTAT
  2. THERMOSTAT

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