MCB

abbreviation: Marine Corps Base
Found on http://www.encyclo.co.uk/local/20021

MCB

Memory Control Block
Found on http://www.encyclo.co.uk/visitor-contributions.php

MCB

Miniature Circuit Breaker - Modern replacement for fuses in consumer units (fuse boxes). Has benefit of more precise tripping and can be reset. In my opinion all fuse boxes and consumer units that still have fuses should be converted to use these.
Found on http://basic1.easily.co.uk/039069/01C053/electrical_glossary.htm

MCB

Molecular and Cellular Biology [periodical, périodique]
Found on http://www.encyclo.co.uk/local/20895

MCB

Miniature circuit breaker, these are the switches (or fuses) protecting each circuit.
Found on http://www.encyclo.co.uk/local/21604
No exact match found