| 释义 |
dispersive, a.|dɪˈspɜːsɪv|
[f. L. type dispersīv-us, ppl. stem of dispergĕre to disperse: see -ive. Cf. F. dispersif, -ive.]
Having the character or quality of dispersing; serving or tending to disperse.
1627–77Feltham Resolves i. liii. 84 A fond popularity bewitches the soul, to strow about the wealth, and means; and, to feed that dispersive humor, all ways shall be trodden. 1737M. Green Spleen 730 Nor wanting the dispersive bowl Of cloudy weather in the soul. 1800Herschel in Phil. Trans. XC. 443 The dispersive power of different mediums with respect to heat. 1874Morley Compromise (1886) 133 Thought has become dispersive and the centrifugal forces of the human mind..have..become dominant.
b. Optics. Of a refractive medium: Having the quality of causing the different-coloured rays of light to diverge: see dispersion 4.
1802Wollaston in Phil. Trans. XCII. 373 The dispersive power of fluor spar is the least of any substance yet examined. 1831Brewster Optics viii. §66 Flint glass is said to have a greater dispersive power than crown glass, because..it separates the extreme rays of the spectrum..farther from the mean ray. 1893Sir R. Ball Story of Sun 113 The dispersive apparatus of the spectroscope.
Hence diˈspersively adv., in a dispersive manner, by dispersion; diˈspersiveness, the quality of being dispersive.
1841Alford in Life (1873) 133 An indolence and dispersiveness about my efforts. 1878Morley Diderot ii. 18 The characteristic of his activity is dispersiveness. |