spliceosome

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/ˈsplaɪsioʊˌsoʊm//ˈsplaɪsəˌsoʊm/

noun

A dynamic complex of RNA and protein subunits that removes introns from precursor mRNA.

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Meanings

nounspliceosome (plural spliceosomes)

plural spliceosomes · alternative splicosome

  1. biologyA dynamic complex of RNA and protein subunits that removes introns from precursor mRNA.

    This complex, termed a "spliceosome," is thought to contain components necessary for mRNA splicing; its existence can explain how separated exons on pre-mRNA are brought into contact.

    1985 June 28, Edward Brody, “The "spliceosome": yeast pre-messenger RNA associates with 40S complex in a splicing-dependent reaction”, in Science, volume 228, number 4802, page 963

Origin

From splice + -o- + -some.

Full word history & related roots →

Translations

Finnish spliseosomi
  • spliseosomiTranslations
Cite this entry
APA

spliceosome. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/spliceosome

MLA

“spliceosome.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/spliceosome. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “spliceosome,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/spliceosome.

Source: spliceosome on Wiktionary, CC BY-SA 4.0.