A type of
hybridization. In this case, a strand of
DNA is joined with a
complementary strand of
RNA to form a double-stranded
molecule (or one which is partly double-stranded, if one of the original single strands is shorter than the other).
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.