1) Gene expression 
modification of an RNA strand where exons (the coding regions of a transcribed gene) are retained and the introns are removed. Sometimes the exons are recombined either in vivo or experimentally to form alternative splicings, which have various functional effects.
In molecular biology and genetics, splicing is a modification of the nascent pre-messenger RNA (pre-mRNA) transcript in which introns are removed and exons are joined. For nuclear encoded genes, splicing takes place within the nucleus after or concurrently with transcription. Splicing is needed for the typical eukaryotic messenger RNA (mRNA) befor...
(from the article `nucleic acid`) In prokaryotes the protein coding sequence occupies one continuous linear segment of DNA. However, in eukaryotic genes the coding sequences are ... The removal of introns, called RNA splicing, appears to be mediated by small nuclear ribonucleoprotein particles (snRNP`s). These particles have RNA ... ...
<molecular biology> The removal of introns from primary RNA transcripts. ... (23 Aug 1998) ... 
The removal of introns from primary RNA transcripts. See alternative splicing.
Type: Term Pronunciation: splīs′ing Synonyms: splicing2
process of removing intron-encoded RNA sequences from eukaryotic primary transcripts and reconnecting those encoded by exons