northbridge

Short definition from Wiktionary

Noun

1. 1
   A microchip connected directly to the CPU (unlike the southbridge) and thus responsible for tasks that require the highest performance.

Proper noun

1. 1
   A town in Worcester County, Massachusetts, United States.
2. 2
   A suburb on the North Shore of Sydney, New South Wales, Australia.
3. 3
   An inner suburb of Perth, Western Australia.