Strong’s Greek
G439 — anthrakia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀνθρακιά
anthrakia — pronounced anth-rak-ee-ah'
from 440; a bed of burning coals:--fire of coals. see GREEK for 440
2 occurrences in the KJV.
John 18:18
And the servants and officers stood there, who had made a fire of coals; for it was cold: and they warmed themselves: and Peter stood with them, and warmed himself.
John 21:9
As soon then as they were come to land, they saw a fire of coals there, and fish laid thereon, and bread.