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

Isatogen :: Isatogen (n.) A complex nitrogenous radical, C8H4NO2, regarded as the essential residue of a series of compounds, related to isatin, which easily pass by reduction to indigo blue..

Lactyl :: Lactyl (n.) An organic residue or radical derived from lactic acid.

Betaine :: Betaine (n.) A nitrogenous base, C5H11NO2, produced artificially, and also occurring naturally in beet-root molasses and its residues, from which it is extracted as a white crystalline substance; -- called also lycine and oxyneurine. It has a sweetish taste..

Saline :: Saline (n.) A crude potash obtained from beet-root residues and other similar sources.

Speiss :: Speiss (n.) A regulus consisting essentially of nickel, obtained as a residue in fusing cobalt and nickel ores with silica and sodium carbonate to make smalt..

Masticin :: Masticin (n.) A white, amorphous, tenacious substance resembling caoutchouc, and obtained as an insoluble residue of mastic..

Pentamethylene :: Pentamethylene (n.) A hypothetical hydrocarbon, C5H10, metameric with the amylenes, and the nucleus of a large number of derivatives; -- so named because regarded as composed of five methylene residues. Cf. Trimethylene, and Tetramethylene..

Asphaltum :: Asphaltum (n.) Mineral pitch, Jews' pitch, or compact native bitumen. It is brittle, of a black or brown color and high luster on a surface of fracture; it melts and burns when heated, leaving no residue. It occurs on the surface and shores of the Dead Sea, which is therefore called Asphaltites, or the Asphaltic Lake. It is found also in many parts of Asia, Europe, and America. See Bitumen..

Thienyl :: Thienyl (n.) The hypothetical radical C4H3S, regarded as the essential residue of thiophene and certain of its derivatives..

Vinyl :: Vinyl (n.) The hypothetical radical C2H3, regarded as the characteristic residue of ethylene and that related series of unsaturated hydrocarbons with which the allyl compounds are homologous..

Propinyl :: Propinyl (n.) A hydrocarbon radical regarded as an essential residue of propine and allied compounds.

Tartronyl :: Tartronyl (n.) A hypothetical radical constituting the characteristic residue of tartronic acid and certain of its derivatives.

Brine :: Brine (n.) Water saturated or strongly impregnated with salt; pickle; hence, any strong saline solution; also, the saline residue or strong mother liquor resulting from the evaporation of natural or artificial waters..

Elaterium :: Elaterium (n.) A cathartic substance obtained, in the form of yellowish or greenish cakes, as the dried residue of the juice of the wild or squirting cucumber (Ecballium agreste, formerly called Momordica Elaterium)..

Propyl :: Propyl (n.) The hypothetical radical C3H7, regarded as the essential residue of propane and related compounds..

Phenyl :: Phenyl (n.) A hydrocarbon radical (C6H5) regarded as the essential residue of benzene, and the basis of an immense number of aromatic derivatives..

Residuum :: Residuum (n.) That which is left after any process of separation or purification; that which remains after certain specified deductions are made; residue.

Radical :: Radical (n.) Specifically, a group of two or more atoms, not completely saturated, which are so linked that their union implies certain properties, and are conveniently regarded as playing the part of a single atom; a residue; -- called also a compound radical. Cf. Residue..

Petrolatum :: Petrolatum (n.) A semisolid unctuous substance, neutral, and without taste 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..

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