'sulfur' definitions:

Definition of 'sulfur'

(from WordNet)
noun
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]
verb
Treat with sulphur in order to preserve; "These dried fruits are sulphured" [syn: sulphur, sulfur]