Search the Dictionary

white, amorphous, tenacious substance resembling caoutchouc, and obtained as an insoluble residue of mastic.

The hypothetical hydrocarbon radical CH, regarded as an essential residue of certain organic compounds.

A hydrocarbon radical, CH3, not existing alone but regarded as an essential residue of methane, and appearing as a component part of many derivatives; as, methyl alcohol, methyl ether, methyl amine, etc. [Formerly written also methule, methyle, etc.] Methyl alcohol (Chem.), a light, volatile, inflammable liquid, CH3.OH…

A hydrocarbon radical, CH2, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; as, methylene bromide, CH2Br2; -- formerly called also methene. Methylene blue (Chem.), an artificial dyestuff consisting of a complex sulphur derivative of diphenyl amine; -- c…

A hypothetical radical regarded as the essential residue of myricin; -- called also melissyl.

A hydrocarbon radical regarded as the essential residue of naphthalene.

A hypothetical radical (C8H15O), regarded as the essential residue of octoic acid.

A hypothetical hydrocarbon radical regarded as an essential residue of octane, and as entering into its derivatives; as, octyl alcohol.

The organic basis of bone tissue; the residue after removal of the mineral matters from bone by dilute acid; in embryonic tissue, the substance in which the mineral salts are deposited to form bone; -- called also ostein. Chemically it is the same as collagen.

A hydrocarbon radical (C2O2) regarded as a residue of oxalic acid and occurring in derivatives of it.

A polymeric modification of cyanogen, obtained as a brown or black amorphous residue by heating mercuric cyanide.

molecules of a monobasic acid; having five hydrogen atoms capable of substitution by acid residues; -- said of certain complex bases.

a large number of derivatives; -- so named because regarded as composed of five methylene residues. Cf. Trimethylene, and Tetramethylene.

or odor, derived from petroleum by distilling off the lighter portions and purifying the residue. It is a yellowish, fatlike mass, transparent in thin layers, and somewhat fluorescent. It is used as a bland protective dressing, and as a substitute for fatty materials in ointments. U. S. Pharm.

A hydrocarbon radical (C6H5) regarded as the essential residue of benzene, and the basis of an immense number of aromatic derivatives. Phenyl hydrate (Chem.), phenol or carbolic acid. -- Phenyl hydrazine (Chem.), a nitrogenous base (C6H5.N2H3) produced artificially as a colorless oil which unites with acids, ketones,…

ed product at various stages of the process; or, in beet-sugar manufacture, the vegetable residue after the sugar juice has been expressed.

ydrocarbon radical, C3H5, isomeric with allyl and glyceryl, and regarded as the essential residue of glycerin. Cf. Allyl, and Glyceryl.

A hydrocarbon radical regarded as an essential residue of propine and allied compounds.

The hypothetical radical C3H5O, regarded as the essential residue of propionic acid and certain related compounds.

The hypothetical radical C3H7, regarded as the essential residue of propane and related compounds.