θειώδης theiṓdēs

Meaning

sulphur-like, i.e. sulphurous

In the King James Version: brimstone

Derivation: from G2303 (θεῖον) and 1491;

Where it is used

• Revelation 9:17 Now the horses and riders in my vision looked like this: The riders had breastplates the colors of fire, sapphire, and sulfur. The heads of the horses were like the heads of lions, and out of their mouths proceeded fire, smoke, and sulfur.