/sul"feuhr/ , n.
1. Also, esp. Brit., sulphur . Chem. a nonmetallic element that exists in several forms, the ordinary one being a yellow rhombic crystalline solid, and that burns with a blue flame and a suffocating odor: used esp. in making gunpowder and matches, in medicine, in vulcanizing rubber, etc. Symbol: S; at. wt.: 32.064; at. no.: 16; sp. gr.: 2.07 at 20° C.
2. sulphur (def. 2).
[ 1300-50; ME sulphur sulpur, sulphur, sulfur brimstone, sulfur ]