Wordnet 3.0
NOUN (1)
1. 
 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: sulfur, S, sulphur, atomic number 16]
WordNet (r) 3.0 (2006):
atomic number 16
    n 1: 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: sulfur, S,
         sulphur, atomic number 16]