| 释义 |
extravasation|ɛkˌstrævəˈseɪʃən|
[f. extravasate v.: see -ation. Cf. F. extravasation.]
1. Path. The escape of an organic fluid (e.g. blood, sap) from its proper vessels into the surrounding tissues; an instance of this.
1676Wiseman Surgery 2 The Plenitude of Vessels..causeth an Extravasation of bloud. 1796Morse Amer. Geog. I. 338 A stagnation and extravasation of the juices of the stalk. 1836Todd Cycl. Anat. I. 400/1 The extravasation of urine. 1877Roberts Handbk. Med. I. 28 Points of redness..due to minute extravasations of blood.
fig.1685Burnet Lett. (1687) 143 Such an extravasation..of silver, occasions a great deadness in Trade. 1691Beverley Mem. Kingd. Christ 9 God having suffer'd..so dangerous an Extravasation of the French Power.
b. A mass or spot of extravasated blood.
1836Todd Cycl. Anat. I. 52/2 On the substance of the extravasation there were a..number of spots of red blood. 1878A. Hamilton Nerv. Dis. 19 The crura and pons are to be examined carefully for softening extravasations.
2. Geol. Effusion (of molten rock) from a subterranean reservoir; also, a deposit so formed.
1842G. P. Scrope Volcanos 9 To permit an extravasation of some of the heated and liquefied and gaseous matters. 1864C. P. Smyth Our Inheritance ii. viii. (1880) 144 Amongst the veins and extravasations of granite and basalt. |