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atoluidine; especially, the commonest one, or paratoluidine, which is obtained as a white crystalline substance.

Of, pertaining to, or designating, any one of three isomeric crystalline acids, C9H10ON.CO2H, which are toluyl derivatives of glycocoll.

A white concretionary form of calcium carbonate, usually hard and semicrystalline. It is deposited from the water of springs or streams holding lime in solution. Extensive deposits exist at Tivoli, near Rome.

A colorless crystalline substance prepared by the reaction of carbolic acid with bromine.

urring naturally in unripe beet roots, and produced artificially from glycerin as a white crystalline substance.

, or designating, that acid of the fatty acids heterologous with tridecane. It is a white crystalline substance.

4H7N3O2, obtained, by the action of the vapor of cyanic acid on cold aldehyde, as a white crystalline substance having a slightly acid taste and faint smell; -- called also ethidene- or ethylidene-biuret.

C6H3.(CO2)3, of the aromatic series, obtained, by the oxidation of mesitylene, as a white crystalline substance. [Written also trimesic.]

mbination of neutral and acid sodium carbonate, Na2CO3.2HNaCO3.2H2O, occurring as a white crystalline fibrous deposit from certain soda brine springs and lakes; -- called also urao, and by the ancients nitrum.

o, or designating, an acid obtained from atropine and certain other alkaloids, as a white crystalline substance slightly soluble in water.

A white crystalline alkaloid, C8H15NO, produced by decomposing atropine.

A white crystalline nitrogenous substance present in small amount in the pancreas and spleen, and formed in large quantity from the decomposition of proteid matter by various means, -- as by pancreatic digestion, by putrefaction as of cheese, by the action of boiling acids, etc. Chemically, it consists of oxyphenol and…

A mineral occurring in white rounded crystalline masses. It is a hydrous borate of lime and soda.

A tasteless white crystalline substance, C9H6O3, found in the bark of a certain plant (Daphne Mezereum), and also obtained by the distillation of certain gums from the Umbelliferæ, as galbanum, asafetida, etc. It is analogous to coumarin. Called also hydroxy- coumarin.

H18O2, of the propiolic acid series, obtained indirectly from undecylenic acid as a white crystalline substance.

, or designating, an acid C11H20O2, homologous with acrylic acid, and obtained as a white crystalline substance by the distillation of castor oil.

that member of the fatty acids which corresponds to undecane, and is obtained as a white crystalline substance, C11H22O2.

A very soluble crystalline body which is the chief constituent of the urine in mammals and some other animals. It is also present in small quantity in blood, serous fluids, lymph, the liver, etc.

side extracted from the leaves of a certain plant (Urechitis suberecta) as a bitter white crystalline substance.

A poisonous glucoside found accompanying urechitin, and extracted as a bitter white crystalline substance.