Origin of pyrogenous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for pyrogenous
Pyrogenous oil of turpentine is another cheap and good solvent.
Gold is, however, much more common in the alluvial grounds than among the primitive and pyrogenous rocks just described.
It is, however, much more common in alluvial grounds than among primitive and pyrogenous rocks.