adjective (a)

• produced by or producing fever(adj.pert)

  Synonym:
  pyrogenetic, pyrogenous
  

  source: wordnet30
• produced under conditions involving intense heat(adj.pert)

  Example:
  Pyrogenic strata.
  

  Synonym:
  igneous, pyrogenous
  

  source: wordnet30
• Producing heat; -- said of substances, as septic poisons, which elevate the temperature of the body and cause fever.(adjective)

  source: webster1913