(of RNA) The procedure by which introns are removed from eukaryotic precursor mRNA molecules and adjacent exon sequences are joined together (spliced).
(of DNA) Manipulation for joining together double-stranded DNA fragments with protruding single-stranded 'sticky ends' by means of ligases.
Source: PAC, 1992, 64, 143. 'Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)' on page 166 (https://doi.org/10.1351/pac199264010143)