Pyrophoric \Pyr`o*phor"ic\, Pyrophorous \Py*roph"o*rous\, a. [Pyro- + Gr. ? to bear.]

Light-producing; of or pertaining to pyrophorus.

Pyrophoric iron (Chem.), finely reduced iron, which ignites spontaneously on contact with air.

Source: Webster's Revised Unabridged Dictionary (1913)