| 释义 |
viˈbrational, a.
[f. prec. + -al1.]
a. Of or pertaining to vibration; vibratory.
1878Prescott Sp. Telephone 249 The number of vibrational forms which may arise from the composition of simple forms are mathematically infinite. 1884H. R. Haweis My Musical Life iii. 86 The very appearance of the wood would guide him to its probable vibrational powers. 1888Encycl. Brit. XXIV. 242 In order that the vibrational impulse may be given as nearly as possible at the centre of the mass of air in the resonant box.
b. vibrational number (see quot. 1881).
1879C. Parry in Grove Dict. Mus. I. 670 As far as the ratios of the vibrational numbers of the limiting sounds are concerned. 1881Broadhouse Mus. Acoustics 48 We are accustomed to take a second of time as the unit, and consequently mean by vibrational number the number of vibrations which the particles of a sounding body perform in one second of time.
c. Physics. Involving or resulting from particular modes of vibration or oscillation of the atoms in a molecule.
1923[see isotope effect s.v. isotope 2]. 1946Nature 26 Oct. 593/2 From an analysis of a suitable vibrational spectrum, it is usually possible to trace the vibrational-levels in the ground-state from V = 0 to V = c. 20. 1970I. E. McCarthy Nuclear Reactions i. v. 109 The nuclear probability amplitude for the excitation of vibrational states is obtained from the quantum theory of harmonic vibrations. 1973C. Sagan Cosmic Connection iv. 27 There are vibrational transitions that occur when two atoms in a given molecule oscillate with respect to each other. |