Non-coding RNA is a type of RNA that does not code for proteins. The term non-coding RNA is often used to describe a large and diverse group of RNA molecules, including microRNAs, long noncoding RNAs, and others. Some synonyms for non-coding RNA include non-translated RNA, non-messenger RNA, and regulatory RNA. These terms all refer to RNA that does not contain the genetic information necessary to code for a specific protein, but instead plays a role in regulating gene expression and various cellular processes. Non-coding RNA is an important area of study in molecular biology and has been linked to many diseases and disorders.