| 释义 |
exfoliation|ɛksˌfəʊlɪˈeɪʃən|
[a. F. exfoliation, f. as prec.: see -ation.]
1. Surg. and Path. The action or process of exfoliating.
1676Wiseman Chirurg. Treat. iv. iv. 264 The bone laid bare in order to Exfoliation. c1720W. Gibson Farrier's Dispens. i. i. (1734) 25 Euphorbium..It's Tincture is often applied to Bones that are laid bare, to hasten an Exfoliation. 1741Monro Anat. (ed. 3) 51 The Exfoliation which Cartilages are subject to. 1797M. Baillie Morb. Anat. (1807) 89 The cricoid cartilage, being converted into bone, was separated by exfoliation. 1851Carpenter Man. Phys. (ed. 2) 173 This moulting is precisely analogous to the exfoliation and new formation of the Epidermis, in Man.
b. transf. Cf. exfoliate 3.
1802Playfair Illustr. Hutton. Th. 31 This stone is..subject to perpetual exfoliation. 1816R. Jameson Char. Min. (1817) 294 Exfoliation, or the separation of the folia of a mineral from each other. 1848–53Layard Nineveh ix. 223 A kind of exfoliation had taken place on the surface of the glass vase. 1860Tyndall Glac. i. i. 6 The exfoliation of rails, the fibres of iron, etc. 1884Bower & Scott De Bary's Phaner. & Ferns 413 In old age they [parenchymatous cells] die off..after breaking up into layers or rows (exfoliation).
2. That which is exfoliated; an exfoliated portion; a ‘coat’ or layer in the stem of a tree.
1750G. Hughes Barbadoes 110 The several exfoliations of its [a tree's] green part were equal in number to its branches. 1835Lindley Introd. Bot. (1848) I. 238 The spongelets of the aerial roots consist of..exfoliations of the epiphlœum. 1876Gross Dis. Bladder 27 Such casts..are mistaken for exfoliations of the lining membrane. |