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  • WordNet 3.6
    • n Protium genus of chiefly tropical American trees having fragrant wood and yielding gum elemi
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Century Dictionary and Cyclopedia
    • n protium A genus of polypetalous trees of the order Burseraceæ and tribe Bursereæ. It is characterized by a free cup-shaped four- to six-cleft calyx, a cup-like disk bearing the four to six long narrow petals, and the eight to twelve unequal erect stamens on its margin, and a globose drupe, the fleshy outside splitting into four valves and the stone consisting of from one to four bony one-seeded nutlets, at first united together but finally free. There are about 50 species, natives of the tropics of both hemispheres. They are small trees, exuding a balsamic resin, and bearing pinnate leaves toward the end of the branchlets, composed of three or more large stalked leaflets. The small slender-pedicelled flowers form branching panicles borne on long stalks. P. Guianense is the hyawa or incense-tree of British Guiana, and P. altissimum is there known as white cedar. Some of the species have formerly been classed under Icica (Aublet, 1775). They produce many valuable gum-resins, for which see elemi, acoutchi-resin, carauna, conima, and hyawa gum (under gum).
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In literature:

That is one reason I am so interested in this protium on which you chemists are working.
"City of Endless Night" by Milo Hastings