noun Download 🔗Share A portion of a split gene that is included in pre-RNA transcripts but is removed during RNA processing and rapidly degraded. Examples : "The pre-mRNA, like a rough draft of a school essay, contains introns, which are non-coding sections that must be cut out before the final, functional mRNA transcript is ready to be translated. " biology biochemistry organism part process science Chat with AIVocabulary GamePractice Reading