1. A low sand ridge, underwater by high tide, which extends generally parallel with the shoreline; usually separated by an intervening trough from the beach.

2. A spheroidal mass of sedimentary material.

3. Common name for a nodule, especially of ironstone.

In fine grinding, one of the crushing bodies used in a ball mill.

1. A bullet for general use, as distinguished from bullets for special uses such as armor-piercing, incendiary, or high explosive.

2. A small-arms solid propellant which is oblate spheroidal in shape, generally a double-base propellant.