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A mineral resin, of a blackish brown color, occurring in soft, flexible masses; -- called also mineral caoutchouc, and elastic bitumen.

A nonconductor of electricity, as amber, glass, resin, etc., employed to excite or accumulate electricity.

ectricity that appears at the negative pole or cathode, or is produced by the friction of resinous substance; -- called also resinous electricity. (h) Organic electricity, that which is developed in organic structures, either animal or vegetable, the phrase animal electricity being much more common.…

tricity, and repeating the charge indefinitely by induction, consisting of a flat cake of resin, shelllac, or ebonite, upon which is placed a plate of metal.

A fragrant gum resin obtained chiefly tropical trees of the genera Amyris and Canarium. A. elemifera yields Mexican elemi; C. commune, the Manila elemi. It is used in the manufacture of varnishes, also in ointments and plasters.

A transparent, colorless oil obtained from elemi resin by distillation with water; also, a crystallizable extract from the resin.

th sulphuric acid, and hence called also sulphuric ether. It is powerful solvent of fats, resins, and pyroxylin, but finds its chief use as an anæsthetic. Called also ethyl oxide.ethyl ether.

A fossil resin, so called from its strong, peculiar, pleasant odor.

exudation, usually in the form of yellow tears, produced chiefly by the African Euphorbia resinifrea. It was formerly employed medicinally, but was found so violent in its effects that its use is nearly abandoned.

mors, moisture, juice, or gum, as through pores or incisions; also, the substance exuded. Resins, a class of proximate principles, existing in almost all plants and appearing on the external surface of many of them in the form of exudations. Am. Cyc.

A white crystallized mineral resin from the Fichtelgebirge, Bavaria.

f large size and elegant shape, some of them valued for their timber and others for their resin. The species are distinguished as the balsam fir, the silver fir, the red fir, etc. The Scoth fir is a Pinus.

A hydrocarbon extracted from gutta-percha, as a yellow, resinous substance; -- called also fluanil.

contained in rocks. whether petrified or not; as, fossil plants, shells. Fossil copal, a resinous substance, first found in the blue clay at Highgate, near London, and apparently a vegetable resin, partly changed by remaining in the earth. -- Fossil cork, flax, paper, or wood, varieties of amianthus. -- Fossil farin…

A fragrant, aromatic resin, or gum resin, burned as an incense in religious rites or for medicinal fumigation. The best kinds now come from East Indian trees, of the genus Boswellia; a commoner sort, from the Norway spruce (Abies excelsa) and other coniferous trees. The frankincense of the ancient Jews is still unident…

A gum resin exuding from the stems of certain Asiatic umbelliferous plants, mostly species of Ferula. The Bubon Galbanum of South Africa furnishes an inferior kind of galbanum. It has an acrid, bitter taste, a strong, unpleasant smell, and is used for medical purposes, also in the arts, as in the manufacture of varnish…

An impure resin of turpentine, hardened on the outside of pine trees by the spontaneous evaporation of its essential oil. When purified, it is called yellow pitch, white pitch, or Burgundy pitch.

A concrete juice, or gum resin, produced by several species of trees in Siam, Ceylon, and Malabar. It is brought in masses, or cylindrical rolls, from Cambodia, or Cambogia, -- whence its name. The best kind is of a dense, compact texture, and of a beatiful reddish yellow. Taking internally, it is a strong and harsh ca…

ly produced by the destructive distillation of gas coal, or sometimes of peat, wood, oil, resin, etc. It gives a brilliant light when burned, and is the common gas used for illuminating purposes.

A special organ of plants, usually minute and globular, which often secretes some kind of resinous, gummy, or aromatic product.