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Having the same percentage composition; -- said of two or more different substances which contain the same ingredients in the same proportions by weight, often used with with. Specif.: (a) Polymeric; i. e., having the same elements united in the same proportion by weight, but with different molecular weights; as, acety…

The state, quality, or relation, of two or more isomeric substances. Physical isomerism (Chem.), the condition or relation of certain (metameric) substances, which, while chemically identical (in that they have the same composition, the same molecular weights, and the same ultimate constitution), are yet physically dif…

Isomorphism between substances that are isomeric.

A substance which is similar to another in crystalline form and composition.

A similarity of crystalline form between substances of similar composition, as between the sulphates of barium (BaSO4) and strontium (SrSO4). It is sometimes extended to include similarity of form between substances of unlike composition, which is more properly called homoeomorphism.

Isomorphism between the three forms, severally, of two trimorphous substances.

An artificial nitrogenous base, isomeric with urea, and forming a white crystalline substance; -- called also isuretine.

As a substance for any noun of the neuter gender; as, here is the book, take it home.

Pertaining to, or designating, an acid, C5H6O4, which is obtained as a white crystalline substance by decomposing aconitic and other organic acids.

The hard, white, opaque, fine-grained substance constituting the tusks of the elephant. It is a variety of dentine, characterized by the minuteness and close arrangement of the tubes, as also by their double flexure. It is used in manufacturing articles of ornament or utility.

An alkaloid found in jaborandi leaves, from which it is extracted as a white amorphous substance. In its action it resembles atropine.

Lacking matter; empty; void of substance.

Anything brought to a gelatinous condition; a viscous, translucent substance in a condition between liquid and solid; a stiffened solution of gelatin, gum, or the like.

A yellow crystalline substance resembling quinone, extracted from green shucks of the walnut (Juglans regia); -- called also nucin.

The characteristic fluid of any vegetable or animal substance; the sap or part which can be expressed from fruit, etc.; the fluid part which separates from meat in cooking. An animal whose juices are unsound. Arbuthnot. The juice of July flowers. B. Jonson. The juice of Egypt's grape. Shak. Letters which Edward Digby w…

A yellow amorphous substance extracted from juniper berries.

A fragment of any solid substance; a thick piece. See Chunk. [Colloq.] Lowell.

The protoplasmic substance of the nucleus of a cell: nucleoplasm; -- in opposition to kytoplasma, the protoplasm of the cell.

Of or pertaining to katabolism; as, katabolic processes, which give rise to substances (katastates) of decreasing complexity and increasing stability.

(Physiol.) A substance formed by a katabolic process; -- opposed to anastate. See Katabolic.