Wordnet 3.0
ADJECTIVE (1)
1. 
 of or relating to or containing sulfur; 
- Example: "sulphuric esters"[syn: sulphuric, sulfuric]
WordNet (r) 3.0 (2006):
sulfuric
    adj 1: of or relating to or containing sulfur; "sulphuric
           esters" [syn: sulphuric, sulfuric]