pīˈräfərəs noun
Etymology: New Latin, from Greek pyrophoros fire-bearing, from pyr- + -phoros -phorous
1. plural pyrophori : any of several substances or mixtures (as a carbonized mixture of alum and sugar, or finely divided lead or iron) that ignite spontaneously on exposure to air
2. capitalized : a genus of large tropical American beetles (family Elateridae) bearing a pair of large luminous organs on the prothorax — see fire beetle