Real Dictionary

recombinant DNA in American English
any recombined DNA, esp. that formed in the laboratory by splicing together pieces of DNA from different species, as to create new life forms, modify existing ones, or produce useful biological chemicals, as insulin
noun: DNA in which one or more segments or genes have been inserted, either naturally or by laboratory manipulation, from a different molecule or from another part of the same molecule, resulting in a new genetic combination

recombinant DNA in British English
noun: DNA molecules that are extracted from different sources and chemically joined together; for example DNA comprising an animal gene may be recombined with DNA from a bacterium