| 释义 |
green-stone, ˈgreenstone
[f. green a. + stone n.; in sense 1 ad. G. grünstein.]
1. Geol. A term of wide and varying application, but usually comprising the greenish-coloured eruptive rocks containing feldspar and hornblende (or augite), such as diorite, melaphyre, etc.
1805Edin. Rev. VI. 235 The name grünstein or green⁓stone has been given by Werner to a rock composed of horneblende and feldspar. 1813Bakewell Introd. Geol. (1815) 117 Transitions from granite to sienite and green⁓stone may sometimes be observed in the same block. 1826W. Phillips Outl. Min. & Geol. (ed. 4) 151 The Diabase, Diorite and Amphibolite of French authors, and the Grünstein of the German School, seems to include both Green⁓stone and Hornblende rock. 1856Page Adv. Text-Bk. Geol. §119 The greenstones (whinstones of Scotland) are less compact, more granular [etc.]. 1857R. Tomes Amer. in Japan xii. 283 Several quarries of trachyte, or green⁓stone, are worked in the neighbourhood. 1862Smiles Engineers III. 297 A remarkable bed of whinstone or green⁓stone.
attrib.1830Lyell Princ. Geol. I. 175 A large block of greenstone-porphyry. 1842Miller O. R. Sandst. viii. (ed. 2) 183 The greenstone bed of Salisbury Crags. 1875J. Croll Climate & T. xxvii. 442 A Greenstone boulder.
2. Min. = nephrite, a variety of jade.
1772–84Cook Voy. (1790) I. 125 Many of these Indians wore pieces of green-stone round their necks which were transparent, and resembled an emerald. These being examined, appeared to be a species of the nephritic stone. 1849Dana Geol. xvii. (1850) 636 The greenstone, usually called jade, used for ornaments, and also in making hatchets. 1859A. S. Thomson Story N. Zealand I. i. vii. 140 The greenstone composing these implements of war is called nephrite by mineralogists..The most valuable kind is as clear as glass with a slight green tinge. 1892F. R. Chapman (title) The Working of Greenstone by the Maoris.
attrib.1859A. S. Thomson Story N. Zealand I. i. vii. 140 Of these [weapons] the greenstone meri was the most esteemed. 1885Times (weekly ed.) 30 Jan. 13/2 Their [the natives of New Guinea] principal instrument is a green⁓stone adze.
3. ‘A very hard and close-textured stone used for putting the last edge on lancets and other delicate surgical instruments.’ (Cent. Dict.)
4. (See quot.)
1874G. Lawson Dis. Eye 16 Sulphate of Copper, or a combination of this salt with alum, ‘lapis divinus’, or ‘green stone’. |