MCR may refer to: Music Modena City Ramblers, an Italian folk rock band My Chemical Romance, an American rock band Organisations Maryport and Carlisle Railway, M&CR, a pre-grouping British railway company Midland Counties Railway, an early British railway company Muslim Community Radio, a radio station based in London, UK Middle common room, a postgraduate student organization Marine Commando Regiment, Canada Romandy Citizens' Movement (French: Mouvement Citoyens Romand), Swiss political party Science Methyl coenzyme M reductase, an enzyme that occurs in methanogenic archea Micro Carbon Residue, a petroleum industry test Mineralocorticoid receptor, a protein Multi-component reaction, chemical reaction Mutual Climatic Range, for determining past climate at an archaeological site Technology Move to Coprocessor from Register, an ARM architecture CPU instruction Critical Mach number (Mcr), in aeronautics Maximum continuous rating, of a generating station Multi-component refrigerant Monitor Console Routine, of RSX-11 operating system Other Medical care ratio, a healthcare metric Master control room, a room for routing all incoming and outgoing signals Master of Clinical Research, an academic degree Mahjong Competition Rules See also