G2303 θεῖον (theîon)

KJV renderings: brimstone
Strong's definition: sulphur
Derivation: probably neuter of G2304 (θεῖος) (in its original sense of flashing);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.