Rabat

noun

1. A piece of cloth fitted to the collar and covering the shirt front, worn chiefly by Roman Catholic and Anglican clergy.
2. In geometry, to revolve about an axis in the horizontal or vertical plane of projection into that plane.
3. A kind of linen collar worn by some ecclesiastics, falling down upon the chest and leaving the neck exposed.
4. A polishing-material made from unglazed pottery which has failed in baking, used by marble-workers, etc.
5. A polishing material made of potter's clay that has failed in baking.