baseplate

1. A solid piece of material that has enough strength and sturdiness to serve as the surface to which other things are attached to be supported.

2. A solid piece of material that has enough strength and sturdiness to serve as the surface to which other things are attached to be supported.

   (broadly)The foundation of a skateboard that mounts directly to the underside of the deck using hardware.

3. Synonym of tie plate.

regular