limoneen

Limoneen is a fictional organic compound referenced in speculative fiction, worldbuilding exercises, and some role-playing game materials. It is not an established chemical name in published scientific literature. The name blends "lemon" with the suffix "-een," a common ending for hydrocarbon and terpene-like substances.

In fictional contexts, limoneen is described as a volatile, citrus-scented hydrocarbon with a simple monoterpene-like framework. Proposals vary, but it is often depicted as contributing a bright lemon note with green, resinous undertones. Its biosynthesis in imagined organisms is sometimes linked to a hypothetical lemon pathway akin to limonene biosynthesis, possibly via a specialized terpene synthase.

Limoneen is imagined as either a minor constituent of citrus relatives in some worldbuilding settings or as a synthetically produced fragrance compound used in fictional perfumery and flavoring. In these contexts, it is valued for its clean, uplifting aroma comparable to lemon zest. In stories or games, it is used to flavor beverages or to scent cosmetics in a manner consistent with a top-note citrus, though real-world lab synthesis is not described in credible sources.

Safety and regulation: As a fictional substance, limoneen has no real regulatory status or safety data. Real terpenes with citrus scents, such as limonene, are subject to standard safety evaluations. See also limonene, terpenes, essential oils.