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alogous to the ketones, and consisting of the sulphuryl group united with two hydrocarbon radicals; as, dimethyl sulphone, (CH.SO

2.OH, a stable colorless crystalline substance. Sulphonic group (Chem.), the hypothetical radical, SO2.OH, the characteristic residue of sulphonic acids.

A hypothetical radical, SH3, regarded as the type and nucleus of the sulphines.

dride, and formerly sulphurous acid. -- Sulphur ether (Chem.), a sulphide of hydrocarbon radicals, formed like the ordinary ethers, which are oxides, but with sulphur in the place of oxygen. -- Sulphur salt (Chem.), a salt of a sulphacid; a sulphosalt. -- Sulphur showers, showers of yellow pollen, resembling sulphur…

The hypothetical radical SO2; -- called also sulphon. Sulphuryl chloride, a chloride, pungent, fuming liquid, SO2.Cl2, obtained by the action of phosphorus pentachloride on sulphur trioxide. On treatment with water it decomposes into sulphuric and hydrochloric acids, and is hence called also sulphuric chloranhydride.…

Involving surds; not capable of being expressed in rational numbers; radical; irrational; as, a surd expression or quantity; a surd number.

A radical, of the aromatic series, regarded as an essential ingredient of certain compounds found in the waxy resin of an Australian species of fig.

cally, the building up of complex compounds by special reactions, whereby their component radicals are so grouped that the resulting substances are identical in every respect with the natural articles when such occur; thus, artificial alcohol, urea, indigo blue, alizarin, etc., are made by synthesis.…

A hypothetical radical constituting the characteristic residue of tartronic acid and certain of its derivatives.

A compound of tellurium with a more positive element or radical; -- formerly called telluret.

Containing, or consisting of, three different parts, as elements, atoms, groups, or radicals, which are regarded as having different functions or relations in the molecule; thus, sodic hydroxide, NaOH, is a ternary compound.

quality in the third degree; having been subjected to the substitution of three atoms or radicals; as, a tertiary alcohol, amine, or salt. Cf. Primary, and Secondary. (CH3)3C.OH.

A tetravalent or quadrivalent atom or radical; as, carbon is a tetrad.

Sometimes, an isomeric radical used to designate certain compounds which are really related to butylene.

s a white crystalline substance; -- so called because once supposed to contain a peculiar radical of four carbon atoms. Called also acetyl-acrylic acid.

The hypothetical radical C4H3S, regarded as the essential residue of thiophene and certain of its derivatives.

The hypothetical radical SO, regarded as an essential constituent of certain sulphurous compounds; as, thionyl chloride.

Any one of the three hypothetical radicals corresponding to the three toluic acids.

The hydrocarbon radical, CH3.C6H4, regarded as characteristic of certain compounds of the aromatic series related to toluene; as, tolyl carbinol.

A hydrocarbon radical, C6H4.(CH2)2, regarded as characteristic of certain toluene derivatives.