a. [ L. sulphureus, sulfureus. ] Consisting of sulphur; having the qualities of sulphur, or brimstone; impregnated with sulphur. [ 1913 Webster ]
Her snakes united, sulphureous waters drink. Pope. [ 1913 Webster ]
-- Sul*phu"re*ous*ly, adv. -- Sul*phu"re*ous*ness, n. [ 1913 Webster ]