The aromatic resinous heartwood of the South-East Asian tree Aquilaria malaccensis and certain other trees of the genera Aquilaria and Gyrinops; (occasionally also) †any of these trees (obsolete).
Also called aloe, agalloch, agila, calambac.
Mid 17th century; earliest use found in John Ogilby (1600–1676), publisher and geographer. From eagle + wood, after (a) Dutch arendshout and (b) its model Portuguese pau de águila, lit. ‘agila wood’, with reinterpretation of the second element as águila, variant of águia.