dual heritage

noun
    1. an upbringing in which one's parents are of different ethnic or religious backgrounds
    2. (as modifier)dual-heritage adoptive families
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012