pyrophorus
noun
py·roph·o·rus
pīˈräfərəs
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
Word History
Etymology
New Latin, from Greek pyrophoros fire-bearing, from pyr- + -phoros -phorous