| 释义 |
silver-leaf
Also silver leaf.
[silver n.]
1. a. Silver beaten out thin; silver-foil.
1728Chambers Cycl., Silver-Leaf, is that the Gold-beaters have reduced into fine, thin Leaves, to be used by Gilders, &c. 1780Encycl. Brit. (ed. 2) V. 3300/1 In this manner silver-leaf is fixed and burnished upon brass in the making of what is called French plate. 1843Holtzapffel Turning I. 376 In the instances of tin-foil, gold and silver leaf, and some others, the hammer is again resorted to after the metals have been rolled. 1875Knight Dict. Mech. 995/2 A yellow, transparent varnish spread over silver-leaf to give it the appearance of gold.
b. A single piece of this.
1728Chambers Cycl. s.v. Couch, The Gilders use Couch for the Quantity of Gold or Silver Leaves applied on the Metals in gilding or silvering. 1799G. Smith Laboratory I. 195 You may lay on the gold or silver leaves with brandy. 1875Knight Dict. Mech. 1240 A silver leaf is sometimes laid over the knots in superior work.
2. A tree or plant having silvery leaves, as the white poplar. Also attrib., having silvery leaves.
1846–50A. Wood Class-bk. Bot. 507 Abele or Silver-leaf Poplar. 1881Gentl. Mag. Jan. 66 Silver-leaf iron-bark country is always in high repute for grazing. 1889J. H. Maiden Useful Pl. 363 Acacia pendula,..Boree, or Silver-leaf Boree.
3. A disease of Prunus and other woody plants caused by the fungus Stereum purpureum, which is frequently associated with a silvery sheen of the leaves and often fatal to affected branches.
1890Blackmore Kit & Kitty III. ii. 27 Blister in a peach, or silver-leaf, or shanking in grapes. 1902Jrnl. Linn. Soc. Bot. XXXV. 390 The disease known as ‘Silver-leaf’ is, so far as I am aware, confined to the Pruneæ, and has been the subject of observation and investigation for more than a quarter of a century. 1929Trans. Brit. Mycol. Soc. XIV. 163 Silver leaf, Stereum purpureum Pers. 1946H. Wormald Diseases of Fruit & Hops iii. 57 The Silver Leaf Order of 1923 requires growers to cut off and burn all dead wood of plum and apple trees before 15th of July each year. 1969P. Thrower Every Day Gardening xiii. 292/2 (caption) Branches and even complete trees can be killed by Silver Leaf disease, and fungal outgrowths form on the dead wood. First, however, the leaves take on a silvery sheen. 1977Field 13 Jan. 66/1 Pruning [of plum trees] should be carried out in late spring..and preferably in dry weather. This is to avoid infection by the silver leaf fungus. |