Lignaloes, or lignum aloes, refer to a fragrant wood of the Aquilaria species. The wood is commonly used for incense, aromatherapy, and perfumery. Some synonyms for lignaloes include agarwood, oud, aloeswood, eaglewood, and gaharu. Agarwood comes from the Sanskrit words "agaru" and "aguru," which translates to "heavy-scented." Oud, on the other hand, comes from Arabic and refers to the wood resin after distillation. Aloeswood derives from the Greek word "aloē," which means fragrant tree resin. Eaglewood and gaharu are both Indonesian terms that refer to the wood's high value and rarity in the international trade market.