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Any one of a class of yellowish brown solid inflammable substances, of vegetable origin, which are nonconductors of electricity, have a vitreous fracture, and are soluble in ether, alcohol, and essential oils, but not in water; specif., pine resin (see Rosin).

Any one of a class of yellowish brown solid inflammable substances, of vegetable origin, which are nonconductors of electricity, have a vitreous fracture, and are soluble in ether, alcohol, and essential oils, but not in water; specif., pine resin (see Rosin).

Any of various oily, gummy substances obtained from certain trees, and dissolving in alcohol but not in water.

1. An amorphous brittle substance consisting of the hardened secretion of a number of plants, probably derived from a volatile oil and similar to a stearoptene. 2. Rosin, the special resin of the pharmacopeia, resina. 3. A precipitate formed by the addition of water to certain tinctures.

A semi-solid oil.

An inflammable substance, which exudes from trees.

RESINOUSLY.

RESINOUSLY.

A gummy substance that exudes from plants.

Inflammable substance produced by the pine, &c.

A solid inflammable substance, obtained from trees either by exudation or extraction. Mineral resin, a resin from minerals, as asphalt. Resin-extractive, extractive matter in which resin predominates. See Rosin.

A substance which exudes from many trees, especially from firs and pines, usually of a yellowish or amber colour, and more or less transparent; the commonest resin, forming the remains of the still after distilling turpentine, is usually called rosin; volatile oil rendered concrete by the oxygen of the atmosphere.

A vegetable product, commonly dry and concrete, more or less brittle, inodorous or slightly odorous, insipid, or of an acrid warm taste; of a smooth, glassy fracture, heavier than water, inflammable, insoluble in water, soluble in alcohol, ether, and yolk of egg, and negatively electrificable by friction. Many resins are used in medicine; the greater part is purgative and irritating. Some act like acrid poisons.

An inflammable amorphous substance of many kinds, obtained from plants and trees.

Same as Rosin.

An excretory product of various plants; an amorphous, more or less translucent, readily fusible substance, insoluble in water, mostly soluble in alcohol, ether, essential oils, or hot fixed oils, and combining with alkalis to form soaps. It is sometimes mixed with volatile oils, sometimes contains benzoic or cinnamic acids (see balsam), and sometimes contains mucilaginous matter (see gum r., under gum). It is also obtained in a fossil state (see amber and dammar).

Rosin, colophony; of the U. S. Ph. and Br. Ph., the residue left after the distillation of oil of turpentine. It consists of the anhydrid, C44H62O4, of abietic acid. It is used as a stimulant constituent of plasters and ointments.

n. [Latin] A solid, inflammable substance, brittle, translucent, and yellow in colour, insoluble in water, but soluble in alcohol and in essential oils—it exudes from certain trees in combination with essential oil and with gum; consists of carbon, hydrogen, and oxygen, and is extensively used in preparations of varnish, soap, &c., and also in medical compounds.