Xanthones

Part of speech: noun

Definitions

1. Organic chemical compounds built on a three-ring oxygen-containing framework, found in plants and used in pharmaceutical research
2. Plant-derived aromatic molecules sharing a dibenzopyranone skeleton, studied for their colour and biological activity
3. Yellowish heterocyclic compounds with a central pyranone ring fused between two benzene rings, occurring naturally in certain fungi and higher plants

Etymology: Xanthones are a class of organic compounds, and the plural form simply names more than one of them. The word takes its base from "xanthone," itself built on the Greek "xanthos," meaning yellow, a reference to the colour of the earliest compounds of this family. The "-one" ending is the standard chemists' marker for a ketone, which places the compound's central carbonyl group within its ring structure.