[1] : WordNet (r) 2.0

sulfur
     n : 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 syn: s, sulphur, atomic
         number 16
     v : treat with sulphur in order to preserve; "these dried fruits
         are sulphured" syn: sulphur
see also:
s sulphur atomic number 16 

Sulfur >> S Words
Sulfur, definition of term: Sulfur
sulfur_pag1.html

Sulfur Dioxide >> S Words
Sulfur Dioxide, definition of term: Sulfur Dioxide
sulfur+dioxide_pag1.html