רֶצֶף (retsephreh'-tsefnoun|masculineglowing stone)
[Heb] רֶצֶף ETCBC: רֶצֶף‎ (subs|coal) OSHL: t.ei.ab TWOT: 2223a GK: H8363
Derivation: for רֶשֶׁף;
Strong's: a red-hot stone (for baking)
KJV: coal.