Source : Webster's Revised Unabridged Dictionary (1913)

Pyrogenic \Pyr`o*gen"ic\, a. [Pyro- + -gen + -ic.] (Physiol.)
   Producing heat; -- said of substances, as septic poisons,
   which elevate the temperature of the body and cause fever.

Source : WordNet®

pyrogenic
     adj 1: produced by or producing fever [syn: {pyrogenous}, {pyrogenetic}]
     2: produced under conditions involving intense heat; "igneous
        rock is rock formed by solidification from a molten state;
        especially from molten magma"; "igneous fusion is fusion
        by heat alone"; "pyrogenic strata" [syn: {igneous}, {pyrogenous}]