Flannel, a loose sort of woollen stuff, not crofted, and woven on a loom like bays.

Flats, in music, a kind of additional notes, which, together with sharps, serve to remedy the defects of musical instruments, wherein temperament is required. See Music.

Flatulence, in medicine. See Medicine.

Flaw, in the sea-language, signifies a sudden gust of wind.