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Molecular   /məlˈɛkjələr/   Listen
adjective
Molecular  adj.  (Phys. & Chem.) Pertaining to, connected with, produced by, or consisting of, molecules; as, molecular forces; molecular groups of atoms, etc.
Molecular attraction (Phys.), attraction acting between the molecules of bodies, and at insensible distances.
Molecular weight (Chem.), the weight of a molecule of any gas or vapor as compared with the hydrogen atom having weight of 1 as a standard; the sum of the atomic weights of the constituents of a molecule; thus, the molecular weight of water (H2O) is 18. For more precise measurements, the weight of the carbon isotope carbon-12 is used as the standard, that isotope having the value of 12.000. In this systen, now used almost universally, the hydrogen atom has a weight of 1.0079.






Collaborative International Dictionary of English 0.48








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"Molecular" Quotes from Famous Books



... water exhibit gyratory movements. Chloral hydrate does not restore the colour to a solution of fuchsine which has been decolorized by sulphurous acid, and so one must assume that the water present is combined in the molecular condition (V. Meyer, Ber., 1880, 13, p. 2343). Chloral may be estimated by distilling the hydrate with milk of lime and measuring the volume of chloroform produced (C.H. Wood, Pharm. Journ., (3) 1, p. 703), or by hydrolysis with a known volume of standard alkali and back titration with ...
— Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 - "Chitral" to "Cincinnati" • Various

... result from differences in the frequency and form of the vibrations initiated by the action of the chemical molecules on these olfactory cells, though he admitted that such a conception involved a very subtle conception of molecular vibration. Vaschide and Van Melle (Paris Academy of Sciences, December 26, 1899) have, again, argued that smell is produced by rays of short wave-lengths, analogous to light-rays, Roentgen rays, etc. Chemical action ...
— Studies in the Psychology of Sex, Volume 4 (of 6) • Havelock Ellis

... Waves. By JOHN TYNDALL. Action of heat and light on molecules.—Heat as an agent in exploring molecular conditions.—The results of a recent incursion into the extra-sensible world of atoms and ...
— Scientific American Supplement, No. 365, December 30, 1882 • Various

... crystals, certain forms, for instance of fluor-spar, which have lain darkly in the earth for ages, but which nevertheless have a potency of light locked up within them. In their case the potential has never become actual, the light is, in fact, held back by a molecular detent. When these crystals are warmed, the detent is lifted, and an outflow of light immediately begins." How often subtle analogies in physical nature whisper interpretations of ...
— Infelice • Augusta Jane Evans Wilson

... he is Heaven-sent, because he came to proclaim not what is ephemeral and perishing, but what is permanent and everlasting. He came to proclaim not the latest theory of gravitation, of molecular vibration, of modes of heat and manners of cold, nor of struggle for existence, nor of supply and demand, nay, not even of scientific charity. He came to proclaim that which was as true in the days of Jesus ...
— Lectures on Russian Literature - Pushkin, Gogol, Turgenef, Tolstoy • Ivan Panin


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