تلفظ بین المللی : /pɹˈaɪməm mˈəʊbaɪl/ تلفظ : [pr'aIm@m m'oUbaIl]
English
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. J. P. Cooke.
In the Ptolemaic system, the outermost of the
revolving concentric spheres constituting the universe, the motion of
which was supposed to carry with it all the inclosed spher...
