baseunit

2. In computing, a base unit is the main part of a computer that holds the processor and memory.

The technician opened the base unit to add more memory.

3. In electronics, a base unit is the main station that connects to smaller handheld devices.

The phone's base unit charges the handset.

4. In science, a base unit is one of the seven official units in the International System of Units.

The kelvin is a base unit for temperature.