5. (Naut.) (a) A cushioned or a piece of soft wood covered with tarred canvas, placed on the trestletrees and against the mast, for the collars of the shrouds to rest on, to prevent chafing. (b) Anything used to prevent chafing.
6. A plate of iron or a mass of wood under the end of a bridge girder, to keep the girder from resting directly on the abutment.