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Polysulphide :: Polysulphide (n.) A sulphide having more than one atom of sulphur in the molecule; -- contrasted with monosulphide.

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..

Vacuist :: Vacuist (n.) One who holds the doctrine that the space between the bodies of the universe, or the molecules and atoms of matter., is a vacuum; -- opposed to plenist..

Chemistry :: Chemistry (n.) That branch of science which treats of the composition of substances, and of the changes which they undergo in consequence of alterations in the constitution of the molecules, which depend upon variations of the number, kind, or mode of arrangement, of the constituent atoms. These atoms are not assumed to be indivisible, but merely the finest grade of subdivision hitherto attained. Chemistry deals with the changes in the composition and constitution of molecules. See Atom, Molecul

Diselenide :: Diselenide (n.) A selenide containing two atoms of selenium in each molecule.

Disulphide :: Disulphide (n.) A binary compound of sulphur containing two atoms of sulphur in each molecule; -- formerly called disulphuret. Cf. Bisulphide.

Pentadecane :: Pentadecane (n.) A hydrocarbon of the paraffin series, (C15H32) found in petroleum, tar oil, etc., and obtained as a colorless liquid; -- so called from the fifteen carbon atoms in the molecule..

Nonane :: Nonane (n.) One of a group of metameric hydrocarbons C9H20 of the paraffin series; -- so called because of the nine carbon atoms in the molecule. Normal nonane is a colorless volatile liquid, an ingredient of ordinary kerosene..

Tetratomic :: Tetratomic (a.) Consisting of four atoms; having four atoms in the molecule, as phosphorus and arsenic..

Mercury :: Mercury (n.) A metallic element mostly obtained by reduction from cinnabar, one of its ores. It is a heavy, opaque, glistening liquid (commonly called quicksilver), and is used in barometers, thermometers, ect. Specific gravity 13.6. Symbol Hg (Hydrargyrum). Atomic weight 199.8. Mercury has a molecule which consists of only one atom. It was named by the alchemists after the god Mercury, and designated by his symbol, /..

Linkage :: Linkage (n.) Manner of linking or of being linked; -- said of the union of atoms or radicals in the molecule.

Microcrith :: Microcrith (n.) The weight of the half hydrogen molecule, or of the hydrogen atom, taken as the standard in comparing the atomic weights of the elements; thus, an atom of oxygen weighs sixteen microcriths. See Crith..

Tetryl :: Tetryl (n.) Butyl; -- so called from the four carbon atoms in the molecule.

Polysilicic :: Polysilicic (a.) Of or pertaining to compounds formed by the condensation of two or more molecules of silicic acid.

Atom :: Atom (n.) A constituent particle of matter, or a molecule supposed to be made up of subordinate particles..

Intramolecular :: Intramolecular (a.) Between molecules; situated, or acting, between the molecules of bodies..

Tetrol :: Tetrol (n.) A hypothetical hydrocarbon, C4H4, analogous to benzene; -- so called from the four carbon atoms in the molecule..

Pore :: Pore (v.) A minute opening or passageway; an interstice between the constituent particles or molecules of a body; as, the pores of stones..

Wave :: Wave (v. i.) A vibration propagated from particle to particle through a body or elastic medium, as in the transmission of sound; an assemblage of vibrating molecules in all phases of a vibration, with no phase repeated; a wave of vibration; an undulation. See Undulation..

Polyatomic :: Polyatomic (a.) Having more than one atom in the molecule; consisting of several atoms.

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