| Abbr. | Name | Family | Description | Ref. |
|---|
| ncRNA | non coding RNA | - | | |
| nmRNA | non messenger RNA | - | synonym of ncRNA | |
| sRNA | small RNA | - | synonym of ncRNA | |
| smnRNA | small non messenger RNA | - | synonym of ncRNA | |
| tRNA | transfer RNA | RF00005 | | |
| sRNA | soluble RNA | - | synonym of tRNA | |
| mRNA | messenger RNA | - | | |
| pcRNA | protein coding RNA | - | synonym of mRNA | |
| rRNA | ribosomal RNA | multiple families | | |
| 5S rRNA | 5S ribosomal RNA | RF00001 | | |
| 5.8S rRNA | 5.8S ribosomal RNA | RF00002 | | |
| SSU rRNA | small subunit ribosomal RNA | CL00111 | | |
| LSU rRNA | large subunit ribosomal RNA | CL00112 | | |
| NoRC RNA | nucleolar remodeling complex associated RNA | RF01518 | | |
| pRNA | promoter RNA | RF01518 | synonym of NoRC RNA | |
| 6S RNA | 6S RNA | RF00013 | | |
| SsrS RNA | | RF00013 | synonym of 6S RNA | |
| aRNA | antisense RNA | - | synonym of asRNA | |
| asRNA | antisense RNA | - | | |
| asmiRNA | antisense micro RNA | - | | |
| cis-NAT | cis-natural antisense transcript | - | Natural antisense transcripts transcribed from the same genomic locus as their target but from the opposite DNA strand and form perfect pairs | |
| crRNA | CRISPR RNA | - | | |
| tracrRNA | trans-activating crRNA | - | | |
| CRISPR RNA | CRISPR-Cas RNA | multiple families | | |
| DD RNA | DNA damage response RNA | - | RNA that activates DNA damage response | |
| diRNA | DSB-induced small RNAs | - | | |
| dsRNA | double stranded RNA | - | | |
| endo-siRNA | endogenous small interfering RNA | - | | |
| exRNA | extracellular RNA | - | | |
| gRNA | guide RNA | - | | |
| hc-siRNA | heterochromatic small interfering RNA | - | | |
| hcsiRNA | heterochromatic small interfering RNA | - | synonym of hc-siRNA | |
| hnRNA | heterogeneous nuclear RNA | - | synonym for pre-mRNA (in the strict sense, it may include nuclear RNA transcripts that do not end up as cytoplasmic mRNA) | |
| RNAi | RNA interference | - | Process in which RNA inhibit gene expression or translation, by neutralizing targeted mRNA molecules | |
| lincRNA | long intergenic non-coding RNA | - | | |
| lncRNA | long non coding RNA | - | | |
| miRNA | micro RNA | multiple families | | |
| mrpRNA | mitochondrial RNA processing ribonuclease | - | synonym of RNase MRP | |
| nat-siRNA | natural antisense short interfering RNA | - | synonym of natsiRNA | |
| natsiRNA | natural antisense short interfering RNA | - | Endogenous RNA regulators, between 21 and 24 nt in length, and are generated from complementary mRNA transcripts which are further processed into siRNA | |
| OxyS RNA | oxidative stress response RNA | RF00035 | Small non coding RNA which is induced in response to oxidative stress in Escherichia coli | |
| piRNA | piwi-interacting RNA | multiple families | Small RNAs that form RNA-protein complexes with piwi proteins in animal cells | |
| qiRNA | QDE-2 interfering RNA | - | | |
| rasiRNA | Repeat associated siRNA | - | Small RNA that is involved in the RNA interference pathway, a type of piRNA | |
| RNase MRP | mitochondrial RNA processing ribonuclease | RF00030 | | |
| RNase P | ribonuclease P | RF00010 | A type of ribonuclease which cleaves RNA | |
| scaRNA | small Cajal body-specific RNA | RF00553 | | |
| scnRNA | small-scan RNA | - | | |
| scRNA | small cytoplasmic RNA | - | | |
| scRNA | small conditional RNA | - | | |
| SgrS RNA | sugar transport-related sRNA | RF00534 | Small RNA that is activated by SgrR in Escherichia coli during glucose-phosphate stress | |
| shRNA | short hairpin RNA | - | | |
| siRNA | small interfering RNA | - | | |
| SL RNA | spliced leader RNA | multiple families | | |
| SmY RNA | mRNA trans-splicing | RF01844 | Small nuclear RNAs found in some species of nematode worms, thought to be involved in mRNA trans-splicing | |
| snoRNA | small nucleolar RNA | multiple families | | |
| snRNA | small nuclear RNA | multiple families | | |
| snRNP | small nuclear ribonucleic proteins | - | | |
| SPA lncRNA | 5' small nucleolar RNA capped and 3' polyadenylated long noncoding RNA | - | | |
| SRP RNA | signal recognition particle RNA | CL00003 | | |
| ssRNA | single stranded RNA | - | | |
| stRNA | small temporal RNA | - | | |
| tasiRNA | trans-acting siRNA | - | | |
| tmRNA | transfer-messenger RNA | RF00023 | Bacterial RNA molecule with dual tRNA-like and messenger RNA-like properties | |
| uRNA | U spliceosomal RNA | multiple families | | |
| vRNA | vault RNA | - | synonym of vtRNA | |
| vtRNA | vault RNA | RF00006 | | |
| Xist RNA | X-inactive specific transcript | - | | |
| Y RNA | Y RNA | RF00019 | Components of the Ro60 ribonucleoprotein particle and necessary for DNA replication through interactions with chromatin and initiation proteins | |
| NATs | natural antisense transcripts | - | Natural antisense transcripts encoded within a cell that have transcript complementarity to other RNA transcripts | |
| pre-mRNA | precursor messenger RNA | - | Immature single strand of messenger RNA | |
| circRNA | circular RNA | - | | |
| msRNA | multicopy, single-stranded RNA | - | Products of a retron-encoded reverse transcriptase (RT) which form a RT-msDNA complex that acts as an anti-phage antitoxin | [25] [26] |
| cfRNA | cell-free RNA | - | | |