| 释义 |
iˈonic, a.2 Physics.
[f. ion + -ic.]
Of or pertaining to ions; composed of or containing ions; that is an ion.
1890Nature 9 Oct. 576 In accordance with the laws of ionic migrations enunciated by Sir F. Bramwell..the ions collected at the tray..fell to pieces. 1898Sir W. Crookes Addr. Brit. Assoc. 22 It becomes more and more clear that cathode rays consist of electrified atoms or ions in rapid progressive motion..Dr. Larmor's theory..likewise involves the idea of an ionic substratum of matter. 1913Q. Rev. July 122 A knowledge of the total mass of water precipitated by the expansion enabled Mr. Wilson..to estimate the number of ionic nuclei required to form the cloud. 1914J. J. Thomson in Phil. Mag. XXVII. 761 Molecules of this type, which I shall call ionic molecules. 1936Discovery June 197/2 A description of ionic clouds formed in electrolytes is given. 1936Jrnl. R. Aeronaut. Soc. XL. 594 Experiments on ionic crystals have determined the weakening effect of minute cracks. 1962[see ion 1]. 1966C. R. Tottle Sci. Engin. Materials ii. 33 Magnesium..will form an ionic compound with two chlorine atoms, MgCl2, by donating its two 3s electrons, one to each of two chlorine atoms. The magnesium will be doubly charged (positive) and will therefore take up a position in the crystal lattice in which for each magnesium atom there are two chlorine atoms.
b. Brought about by, employing, or depending on ions; applied spec. to an electrovalent bond.
1907Brit. Med. Jrnl. 14 Sept. 631/1 The study of ionic medication—the subject of Professor Leduc's paper—has been in many respects the most fruitful of modern times. 1910E. R. Morton Essent. Med. Electr. & Radiogr. (ed. 2) v. 120 The advantages of the ionic method are very obvious... We can introduce a drug exactly where it is required. 1930[see heteropolar a. 3]. 1938R. W. Lawson tr. Hevesy & Paneth's Man. Radioactivity (ed. 2) xxiv. 261 The phenomenon of the ‘ionic wind’... When the air between the plates of an ionization chamber is ionized, then on applying an electric field the air between the plates is set in motion. 1939L. Pauling Nature Chem. Bond i. 4 We describe the interactions in this crystal by saying that each ion forms ionic bonds with its six neighbors, these bonds combining all of the ions in the crystal into one giant molecule. 1958C. C. Adams et al. Space Flight ix. 236 When atomic energy, ionic drive, and light beams have been harnessed for propulsion, combined perhaps with anti-gravity, flight to the stars may be possible. 1966C. R. Tottle Sci. Engin. Materials vi. 127 In solid materials ionic conduction is strongly structure-sensitive, particularly with respect to impurities and flaws or defects in the lattice. 1972Physics Bull. Nov. 651/3 The atomic bonding within the network is partly covalent, partly ionic. |