a baby developing from an embryo created by in-vitro fertilization and selected because it had or lacked particular genes, the genetic makeup often having been modified by genetic engineering.
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British Dictionary definitions for designer baby
informal a baby that is the product of genetic engineering
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