Agarwood oil, also known as oud oil or eaglewood oil, is a highly prized essential oil derived from the resinous heartwood of agarwood trees, primarily Aquilaria species. Renowned for its rich, complex aroma, agarwood oil is cherished in perfumery for its woody, balsamic, and sweet notes with hints of spice and earthiness. The formation of agarwood occurs in response to fungal infection or injury to the tree, triggering a unique resinous secretion that accumulates within the wood over several years. Extracting agarwood oil involves steam distillation or hydrodistillation of the agarwood chips, resulting in a precious and rare oil coveted by perfume artisans and enthusiasts worldwide. Its distinctive scent and therapeutic properties make agarwood oil a coveted ingredient in high-end fragrances and traditional medicines.