Definition of empyrical in US English:

empyrical

adjective

rare
  • Of or relating to combustion or combustibility; combustible.

Origin

Early 19th century; earliest use found in Henry John Todd (d. 1845), Church of England clergyman and literary scholar. From ancient Greek ἔμπυρος burnt (from ἐμ-, variant (before a labial) of ἐν- + πῦρ fire: see pyro-) + -ical.

Pronunciation

empyrical

/ɛmˈpɪrɪkl/