fianchetto Chess [ ˌfɪən'tʃɛtəʊ , -'kɛtəʊ ]
■ noun ( plural fianchettoes ) the development of a bishop by moving it one square to a long diagonal of the board.
■ verb ( fianchettoes , fianchettoing , fianchettoed ) develop (a bishop) in such a way.
Origin
C19: from Ital., dimin. of fianco 'flank'.