definition of
sulfur

[1] #1 sulfur n. [S, sulphur, atomic number 16] an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions). wn

[2] #2 sulfur v. [sulphur] treat with sulphur in order to preserve; "These dried fruits are sulphured". wn