Definition of pyrophorous in US English:

pyrophorous

adjective

rare
  • Pyrophoric 2.

Origin

Early 19th century; earliest use found in Robert Heron (1764–1807), journalist and author. From pyrophorus + -ous; compare -phorous. Cf earlier pyrophoric.

Pronunciation

pyrophorous

/pʌɪˈrɒf(ə)rəs/