• (n.) A liquid hydrocarbon of the terpene series extracted from the seeds of a Japanese prickly ash (Xanthoxylum pipertium) as an aromatic oil.
Xan·thox'y·lene noun [ See Xanthoxylum .] (Chemistry) A liquid hydrocarbon of the terpene series extracted from the seeds of a Japanese prickly ash ( Xanthoxylum pipertium ) as an aromatic oil.