Molecular

Definition of Molecular

Mo`lec´u`lar
a.1.(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.

Related Words

atomic, corpuscular, embryonic, evanescent, germinal, granular, impalpable, imperceptible, imponderable, inappreciable, indiscernible, infinitesimal, intangible, invisible, microcosmic, microscopic, subatomic, tenuous, thin, ultramicroscopic, unseeable
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