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tacamahaca

1. A bitter balsamic resin obtained from tropical American trees of the genus Elaphrium (E. Tomentosum and E. Tacamahaca), and also from East indian trees of the genus Calophyllum; also, the resinous exhudation of the balsam poplar.

2. (Science: botany) Any tree yielding tacamahac resin, especially, in North America, the balsam poplar, or balm of Gilead (Populus balsamifera).