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Mortify :: Mortify (v. t.) To destroy the active powers or essential qualities of; to change by chemical action.

Albumin :: Albumin (n.) A thick, viscous nitrogenous substance, which is the chief and characteristic constituent of white of eggs and of the serum of blood, and is found in other animal substances, both fluid and solid, also in many plants. It is soluble in water and is coagulated by heat and by certain chemical reagents..

Electrolysis :: Electrolysis (n.) The act or process of chemical decomposition, by the action of electricity; as, the electrolysis of silver or nickel for plating; the electrolysis of water..

Optogram :: Optogram (n.) An image of external objects fixed on the retina by the photochemical action of light on the visual purple. See Optography.

Garnet :: Garnet (n.) A mineral having many varieties differing in color and in their constituents, but with the same crystallization (isometric), and conforming to the same general chemical formula. The commonest color is red, the luster is vitreous, and the hardness greater than that of quartz. The dodecahedron and trapezohedron are the common forms..

Logometric :: Logometric (a.) Serving to measure or ascertain chemical equivalents; stoichiometric.

Caustic :: Caustic (a.) Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic..

Aerate :: Aerate (v. t.) To expose to the chemical action of air; to oxygenate (the blood) by respiration; to arterialize.

Leucin :: Leucin (n.) A white, crystalline, nitrogenous substance formed in the decomposition of albuminous matter by pancreatic digestion, by the action of boiling dilute sulphuric acid, and by putrefaction. It is also found as a constituent of various tissues and organs, as the spleen, pancreas, etc., and likewise in the vegetable kingdom. Chemically it is to be considered as amido-caproic acid..

Molecule :: Molecule (n.) A group of atoms so united and combined by chemical affinity that they form a complete, integrated whole, being the smallest portion of any particular compound that can exist in a free state; as, a molecule of water consists of two atoms of hydrogen and one of oxygen. Cf. Atom..

Acidimetry :: Acidimetry (n.) The measurement of the strength of acids, especially by a chemical process based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required..

Collagen :: Collagen (n.) The chemical basis of ordinary connective tissue, as of tendons or sinews and of bone. On being boiled in water it becomes gelatin or glue..

Cementation :: Cementation (n.) A process which consists in surrounding a solid body with the powder of other substances, and heating the whole to a degree not sufficient to cause fusion, the physical properties of the body being changed by chemical combination with powder; thus iron becomes steel by cementation with charcoal, and green glass becomes porcelain by cementation with sand..

Equivalent :: Equivalent (n.) That comparative quantity by weight of an element which possesses the same chemical value as other elements, as determined by actual experiment and reference to the same standard. Specifically: (a) The comparative proportions by which one element replaces another in any particular compound; thus, as zinc replaces hydrogen in hydrochloric acid, their equivalents are 32.5 and 1. (b) The combining proportion by weight of a substance, or the number expressing this proportion, in any

Zymogen :: Zymogen (n.) A mother substance, or antecedent, of an enzyme or chemical ferment; -- applied to such substances as, not being themselves actual ferments, may by internal changes give rise to a ferment..

Actinism :: Actinism (n.) The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography..

Assay :: Assay (v.) To subject, as an ore, alloy, or other metallic compound, to chemical or metallurgical examination, in order to determine the amount of a particular metal contained in it, or to ascertain its composition..

Lignin :: Lignin (n.) A substance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents.

Photochemistry :: Photochemistry (n.) The branch of chemistry which relates to the effect of light in producing chemical changes, as in photography..

Absorb :: Absorb (v. t.) To take up by cohesive, chemical, or any molecular action, as when charcoal absorbs gases. So heat, light, and electricity are absorbed or taken up in the substances into which they pass..

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