• Webster's Revised Unabridged Dictionary
    • n Gurjun A thin balsam or wood oil derived from the Diptcrocarpus lævis, an East Indian tree. It is used in medicine, and as a substitute for linseed oil in the coarser kinds of paint.
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Century Dictionary and Cyclopedia
    • n gurjun The Dipterocarpus alatus, a very large tree of the East Indies and Philippine islands, the wood of which is used for house-building and canoes. This and other species furnish an oleoresin known as wood-oil or gurjun balsam, which is used as a substitute for balsam of copaiba, as a varnish and an ingredient in the coarser kinds of paint, as a substitute for tar in pitching boats, and for preserving timber from the attack of the white ant. As a medicine it is used in gonorrhea, and as an excitant in salves for inveterate ulcers.
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In literature:

Chaulmoogra oil and gurjun oil internally and externally are in some instances of service.
"Essentials of Diseases of the Skin" by Henry Weightman Stelwagon