fi·an·chet·to 
(fē′ən-kĕtō, -chĕtō)
(fē′ən-kĕtō, -chĕtō)n. pl. fi·an·chet·ti (-kĕtē, -chĕtē)
The development in chess of a bishop from its original position to the second square of the adjacent knight's file.
tr. & intr.v. fi·an·chet·toed, fi·an·chet·to·ing, fi·an·chet·tos
To develop as or set up a fianchetto.
[Italian, diminutive of fianco, flank, from Old Italian, from Old French flanc; see FLANK.]