I. sul ‧ fide /ˈsʌlfaɪd/ BrE AmE noun [uncountable and countable]
the American spelling of ↑ sulphide
II. sul ‧ phide BrE AmE British English , sulfide American English /ˈsʌlfaɪd/ noun [uncountable and countable]
a mixture of sulphur with another substance