D defs.my
Entry 1 sense Webster, 1913

Pyro-

· IPA /ˈpaɪ.ɹoʊ/
01 Combining forms designating fire or heat; specifically (Chem.), used to imply an actual or theoretical derivative by the action of heat; as…
  1. 1.
    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.(Chem.)