a. Obs. rare1. [f. L. sulphureus SULPHUREOUS + -AL.] Sulphurous. So † Sulphurean, † Sulphureate adjs.
a. 1604. Hanmer, Chron. Irel. (1633), 65. They sent such a number of damned soules into the sulphureall pits, [etc.].
1607. R. C[arew], trans. Estiennes World of Wonders, A 2. Those tartarean woods, and sulphurean lakes.
c. 1620. T. Robinson, Mary Magd., 758. Though vnto ye poysond lake shee went, Vncapable shee was of ye sulphurean sent.
1632. Lithgow, Trav., I. 21. The Sulphurean mountaine. Ibid., IX. 391. A sulphureat Riuer.