<molecular biology> A single mRNA molecule that is the product of the transcription of several tandemly arranged genes, typically the mRNA transcribed from an operon. ... (18 Nov 1997) ... 
A single mRNA molecule that is the product of the transcription of several tandemly arranged genes; typically the mRNA transcribed from an operon.
single mRNA molecule commonly produced during prokaryotic transcription that carries information encoding multiple polypeptides