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adj. produced by fire or heat

adj. producing fire, heat, or fever

adj. Produced by fire; igneous.

Producing or concerned in the production of fire or heat: as, pyrogenous action in the blood.

Produced by fire; igneous.

adj. produced under conditions involving intense heat

adj. produced by or producing fever

"I place pyroxenic amygdaloid and phonolite (porphyrschiefer) at the end of the formations of Venezuela, not as being the only rocks which I consider as pyrogenous, but as those of which the volcanic origin is probably posterior to the tertiary strata."

pyrogenetic   

igneous