Definition of "sulphureous"

sulphureous

/sʌlˈf(j)ɔːɹɪəs/

adjective
comparative more sulphureous, superlative most sulphureous
1. (British spelling, now rare) Sulphurous.
  Quotations
  Thy blazing hearths, / From deep sulphureous pits, consumeless stores / Of fuel boast.
  1754, Robert Dodsley, Public Virtue, page 46
  The plain of Naples is the image of human passions; sulphureous and fertile; its dangers and its pleasures seem born of these fiery volcanoes, which give the air so many charms, and cause the thunderbolt to growl beneath our feet.
  1807, [Germaine] de Staël Holstein, translated by D[ennis] Lawler, “[[Book XIII. Vesuvius and the plain of Naples.] Chap[ter] IV.] The extempore effusion of Corinna on the Plain of Naples.”, in Corinna; or, Italy. […], volume III, London: […] Corri, […]; and sold by Colburn, […], and Mackenzie, […], page 236
  An excited and highly distempered ideality threw a sulphureous lustre over all.
  1839, Edgar Allan Poe, The Fall of the House of Usher