Gasket

Webster's Dictionary of the English Language

·noun Any ring or washer of packing.

II. Gasket ·noun The plaited hemp used for packing a piston, as of the steam engine and its pumps.

III. Gasket ·noun A line or band used to lash a furled sail securely. Sea gaskets are common lines; harbor gaskets are plaited and decorated lines or bands. Called also casket.