Pyro- \Pyro-\, Pyr- \Pyr-\ . [Gr. ?, ?, fire.]
Combining forms designating fire or heat; specifically
(Chem.), used to imply an actual or theoretical derivative by
the action of heat; as in pyrophosphoric, pyrosulphuric,
pyrotartaric, pyrotungstic, etc.
Source: Webster's Revised Unabridged Dictionary (1913)
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