Eagle Wood, a fragrant wood containing an abundance of resin and an essential oil, highly esteemed for its perfume by Asiatics, who burn it as incense. The tree from which it is obtained is a native of the East Indies, and belongs to the genus aquilaria. There are three varieties, A. Malaccensis or ovata, indigenous to Malacca and Siam, where it is called garos, and to which the name eagle wood is more generally applied; A. agallochum, a large tree with alternate lance-shaped stalked leaves, a native of Silhet, where it is called ugoor, supposed to be the calambac or agallochum of the ancients; and A. secundaria, a tree whose wood is white and inodorous in a healthy state, but when attacked by a disease to which it is subject becomes colored and gives out a powerful scent. The Cochin Chinese are said to make their paper from its bark. Eagle wood is largely used in India and Siam, but the greater part of it is exported to China. According to French authorities, it was burned as a perfume in the imperial palace in the time of Napoleon I. In India it is used also as a cure for the gout, and it is sometimes prescribed in Europe in rheumatic affections.

Its Malayan name is agila, whence the wood was called by the Portuguese pao d'agila, which became corrupted into pao d'aguila, and finally pao d'aquila or eagle wood.