I. sul ‧ fu ‧ rous /ˈsʌlf ə rəs/ BrE AmE adjective
the American spelling of ↑ sulphurous
II. sul ‧ phu ‧ rous BrE AmE British English , sulfurous American English /ˈsʌlfərəs/ adjective
related to, full of, or used with sulphur
I. sul ‧ fu ‧ rous /ˈsʌlf ə rəs/ BrE AmE adjective
the American spelling of ↑ sulphurous
II. sul ‧ phu ‧ rous BrE AmE British English , sulfurous American English /ˈsʌlfərəs/ adjective
related to, full of, or used with sulphur
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012