MADB

Madb or MADB can refer to:

Mythology
 * Medb, an Irish legendary figure in Proto-Indo-European religion, also called Queen Maeve

Science and medicine
 * madB, a protein-encoding gene in Phycomyces blakesleeanus
 * Mandibuloacral dysplasia with type B lipodystrophy, a type of Laminopathy
 * Carboxybiotin decarboxylase, an enzyme

Acronyms
 * Myanma Agricultural Development Bank
 * Minor actinide property database Integrated Nuclear Fuel Cycle Information System
 * Magyar agár database
 * Microarray database
 * Message Addressing Database, for WS-Addressing
 * Material Acquisition Database