flap

A portion of ti ue, as skin, muscle, or fascia, separated from the underlying part, but remaining attached at the base. f. splitting. Splitting, with a knife, the margin of a fistula all round, so as to form flaps that may be brought together and clap.] to united. [Dutch, flap pen, to strike, flask. A small bottle, especially one that is larger about the middle than at the bottom. culture f's. Sterilized f's used in bacteriological research for the reception of culture liquids, etc. Pasteur's f. See under Pasteur, sterilized f. A "gla f., is used rendered in bacteriological research, which free from bacteria by heating at 145° C. for one hour.