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A caoutchouc like substance obtained from the milky juice of the East Indian Euphorbia Kattimundoo. It is used as a cement.

A nitrogenous substance free from phosphorus, supposed to be present in the brain; a body closely related to cerebrin.

A nitrogenous substance, or mixture of substances, containing sulphur in a loose state of combination, and forming the chemical basis of epidermal tissues, such as horn, hair, feathers, and the like. It is an insoluble substance, and, unlike elastin, is not dissolved even by gastric or pancreatic juice. By decompositio…

A tough, horny animal substance entering into the composition of the skeleton of sponges, and other invertebrates; -- called also keratode.

ed. Chem.) A compound of the trioxide and trisulphide of antimony, used in medicine. This substance occurs in nature as the mineral kermesite.

The essential part of a seed; all that is within the seed walls; the edible substance contained in the shell of a nut; hence, anything included in a shell, husk, or integument; as, the kernel of a nut. See Illust. of Endocarp. ' A were as good crack a fusty nut with no kernel Shak.

duction of certain isonitroso compounds of the ketones. In general they are unstable oily substances having a pungent aromatic odor.

One of a series of series of complex nitrogenous substances, represented by methyl ketol and related to indol. Methyl ketol, a weak organic base, obtained as a white crystalline substance having the odor of fæces.

One of a large class of organic substances resembling the aldehydes, obtained by the distillation of certain salts of organic acids and consisting of carbonyl (CO) united with two hydrocarbon radicals. In general the ketones are colorless volatile liquids having a pungent ethereal odor.

Conveying motion; as; kinesodic substance; -- applied esp. to the spinal cord, because it is capable of conveying doth voluntary and reflex motor impulses, without itself being affected by motor impulses applied to it directly.

A piece of wood, shell, stone, or other substance, worn in a perforation of the lip or cheek by many savages.

A resinous substance produced mainly on the banyan tree, but to some extent on other trees, by the Coccus lacca, a scale-shaped insect, the female of which fixes herself on the bark, and exudes from the margin of her body this resinous substance.

A yellow amorphous substance obtained from lac.

An acid amide derived from lactic acid, and obtained as a white crystalline substance having a neutral reaction. It is metameric with alanine.

A white, crystalline substance, obtained from also, by extension, any similar substance.

A white, crystalline substance obtained as an anhydride of alanine, and regarded as an imido derivative of lactic acid.

A white, crystalline substance, having a bitter taste and a neutral reaction, and forming one of the essential ingredients of lactucarium.

A white, crystalline, tasteless substance, found in the milky sap of species of Lactuca, and constituting an essential ingredient of lactucarium.

A thin plate or scale; a laying over another; -- said of thin plates or platelike substances, as of bone or minerals.

The fine impalpable soot obtained from the smoke of carbonaceous substances which have been only partly burnt, as in the flame of a smoking lamp. It consists of finely divided carbon, with sometimes a very small proportion of various impurities. It is used as an ingredient of printers' ink, and various black pigments a…