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One of the elements, related in its chemical qualities to chlorine and iodine. Atomic weight 79.8. Symbol Br. It is a deep reddish brown liquid of a very disagreeable odor, emitting a brownish vapor at the ordinary temperature. In combination it is found in minute quantities in sea water, and in many saline springs. It…

A crystalline substance (chemically, tribromophenol, C6H2Br3OH), used as an antiseptic and disinfectant.

, etc., the appearance of bronze by means of bronze powders, or imitative painting, or by chemical processes. Tomlinson.

A sirupy, nontoxic ptomaine, C5H14N2 (chemically pentamethylene diamine), formed in putrefaction of flesh, etc.

s for measuring the amount of heat contained in bodies or developed by some mechanical or chemical process, as friction, chemical combination, combustion, etc.

g, catalysis. "The catalytic power is ill understood." Ure. Catalytic force, that form of chemical energy formerly supposed to determine catalysis.

eans which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.

Capable of destroying the texture of anything or eating away its substance by chemical action; burning; corrosive; searing.

heat; or the burning so effected. -- Potential cautery, a substance which cauterizes by chemical action; as, lunar caustic; also, the cauterizing produced by such substance.

gree 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.

wheel. See in the Vocabulary. -- Closed chain, Open chain (Chem.), terms applied to the chemical structure of compounds whose rational formulæ are written respectively in the form of a closed ring (see Benzene nucleus, under Benzene), or in an open extended form. -- Endless chain, a chain whose ends have been united…

from which air is excluded. It is used for fuel and in various mechanical, artistic, and chemical processes.

Any mechanical engraving process depending upon chemical action; specif., a process of zinc etching not employing photography. -- Chem`i*graph"ic (#), a.

The force exerted between the atoms of elementary substance whereby they unite to form chemical compounds; chemical attaction; affinity; -- sometimes used as a general expression for chemical activity or relationship.

A person versed in chemistry or given to chemical investigation; an analyst; a maker or seller of chemicals or drugs.

An application of chemical theory and method to the consideration of some particular subject; as, the chemistry of iron; the chemistry of indigo.

applied to the decomposition of organic substance into more simple bodies, by the use of chemical agents alone. Thudichum.

Chemical action taking place through an intervening membrane.

Synthesis of organic compounds by energy derived from chemical changes or reactions. Chemosynthesis of carbohydrates occurs in the nitrite bacteria through the oxidation of ammonia to nitrous acid, and in the nitrate bacteria through the conversion of nitrous into nitric acid. -- Chem`o*syn*thet"ic (#), a.…

ness exhibited by small free-swimming organisms, as bacteria, zoöspores of algæ, etc., to chemical substances held in solution. They may be attracted (positive chemotaxis) or repelled (negative chemotaxis). -- Chem`o*tac"tic (#), a. -- Chem`o*tac"tic*al*ly, adv.