tonka bean

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A tropical South American tree (Dipteryx odorata) in the pea family, having pulpy, egg-shaped, one-seeded pods with fragrant seeds containing coumarin.
• noun The seed of this tree, formerly widely used as a flavoring for food or tobacco. Extracts from tonka beans have been banned as food additives in the United States.

from The Century Dictionary.

• noun The seed of the cuamara, Dipteryx odorata, a tall tree of Venezuela, Guiana, and some neighboring regions.
• noun The tree producing the tonka-bean. See cuamara.

from the GNU version of the Collaborative International Dictionary of English.

• (Bot.) The seed of a leguminous tree (Dipteryx odorata), native of Guiana. It has a peculiarly agreeable smell, and is employed in the scenting of snuff. Called also tonquin bean.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The black wrinkled seed of Dipteryx odorata, a neotropical legume tree, used as a perfume and vanilla substitute.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun tall tropical South American tree having pulpy egg-shaped pods of fragrant black almond-shaped seeds used for flavoring
• noun fragrant black nutlike seeds of the tonka bean tree; used in perfumes and medicines and as a substitute for vanilla