Uracylu

Uracylu is a term used in speculative science and science fiction to denote a fictional organic compound. It is not listed in standard chemical databases and is not recognized as a real chemical species by the scientific community.

The etymology of the name is not standardized; in various works it appears to blend allusions to uracil, a real nucleobase, with a fictional suffix. In published fiction and theory papers, uracylu is typically described as a nitrogen-containing heterocycle capable of engaging in biochemical-like interactions, but the proposed structures vary by author.

In narrative contexts, uracylu is often depicted as enabling novel forms of metabolism, genetic information transfer, catalysis, or materials design. Authors use the molecule as a flexible plot device or as a stand-in in hypothetical reaction schemes and simulations.

Because uracylu is fictional, there are no peer-reviewed studies detailing its synthesis, stability, or safety, and readers should distinguish it from real compounds such as uracil or other nucleobases.

See also: Uracil; Nucleobases; Hypothetical compounds; Fictional chemistry.