The Collaborative International Dictionary of English v.0.48:
Parmesan \Par`me*san"\, a. [F. parmesan, It. parmigiano.] 1. Of or pertaining to Parma in Italy. [1913 Webster] 2. Parmesan cheese. [PJC] Parmesan cheese, a kind of cheese of a rich flavor, though from skimmed milk, made in Parma, Italy. [1913 Webster]