Gasket
Gasket , noun
[Compare French garcette, Italian gaschetta, Sp. cajeta caburn, garceta reef point.]
1.
(Nautical) 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.
2.
(a) (Mechanics) The plaited hemp used for packing a piston, as of the steam engine and its pumps.
(b)
(Mechanics) Any ring or washer of made of a compressible material, used to make joints impermeable to fluids.