a former county of S Wales, formed in 1974 from parts of Breconshire, Glamorgan, and Monmouthshire: replaced in 1996 by the county boroughs of Bridgend, Rhondda Cynon Taff, Merthyr Tydfil, and part of Caerphilly
Mid Glamorgan in American English
(ˈmɪd gləˈmɔrgən)
county in SW Wales: 393 sq mi (1,018 sq km); pop. 534,000