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Ruthenium :: Ruthenium (n.) A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum..

Particle :: Particle (n.) A minute part or portion of matter; a morsel; a little bit; an atom; a jot; as, a particle of sand, of wood, of dust..

Anatomy :: Anatomy (n.) The art of dissecting, or artificially separating the different parts of any organized body, to discover their situation, structure, and economy; dissection..

Atomy :: Atomy (n.) A skeleton.

Herpetotomy :: Herpetotomy (n.) The anatomy or dissection of reptiles.

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

Tribasic :: Tribasic (a.) Capable of neutralizing three molecules of a monacid base, or their equivalent; having three hydrogen atoms capable of replacement by basic elements on radicals; -- said of certain acids; thus, citric acid is a tribasic acid..

Polybromide :: Polybromide (n.) A bromide containing more than one atom of bromine in the molecule.

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, /..

Haematometer :: Haematometer (n.) An instrument for determining the number of blood corpuscles in a given quantity of blood.

Basi- :: Basi- () A combining form, especially in anatomical and botanical words, to indicate the base or position at or near a base; forming a base; as, basibranchials, the most ventral of the cartilages or bones of the branchial arches; basicranial, situated at the base of the cranium; basifacial, basitemporal, etc..

Undecane :: Undecane (n.) A liquid hydrocarbon, C11H24, of the methane series, found in petroleum; -- so called from its containing eleven carbon atoms in the molecule..

Hexabasic :: Hexabasic (a.) Having six hydrogen atoms or six radicals capable of being replaced or saturated by bases; -- said of acids; as, mellitic acid is hexabasic..

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..

Dissect :: Dissect (v. t.) To divide into separate parts; to cut in pieces; to separate and expose the parts of, as an animal or a plant, for examination and to show their structure and relations; to anatomize..

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

Monatomic :: Monatomic (adv.) Consisting of, or containing, one atom; as, the molecule of mercury is monatomic..

Diatomic :: Diatomic (a.) Containing two atoms.

Anatomizing :: Anatomizing (p. pr. & vb. n.) of Anatomiz.

Tetracid :: Tetracid (a.) Capable of neutralizing four molecules of a monobasic acid; having four hydrogen atoms capable of replacement ba acids or acid atoms; -- said of certain bases; thus, erythrine, C4H6(OH)4, is a tetracid alcohol..

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