production of miRNAs involved in gene silencing by miRNA Cleavage of stem-loop RNA precursors into microRNAs (miRNAs), a class of small RNAs that primarily silence genes by blocking the translation of mRNA transcripts into protein, or by increasing the degradation of non-protein-coding RNA transcripts. GO:0030918 GO:0035196 biological_process gene silencing by miRNA, production of miRNAs miRNA biogenesis miRNA processing miRNA-mediated gene silencing, production of miRNAs microRNA biogenesis microRNA biosynthesis microRNA biosynthetic process microRNA metabolic process microRNA metabolism microRNA processing microRNA-mediated gene silencing, production of microRNAs production of microRNAs involved in gene silencing by microRNA