| 释义 |
▪ I. macle|ˈmæk(ə)l|
See also mascle.
[a. F. macle, ad. L. macula spot, mesh.]
1. Cryst. A hemitropic or twin crystal. Also attrib. [After Romé de L'Isle's use of F. macle, 1783.]
1801De Bournon's Acc. certain Minerals in Phil. Trans. XCI. 185 Whence results a kind of macle, the form of which is a rhomboidal tetraedral prism. 1829Nat. Philos., Polaris. Light xvi. 60 (U.K.S.) The irregularities of crystallisation, which are known by the name of Macle, or Hemitrope forms. 1860Maury Phys. Geog. Sea ix. §442 Crystals of ice, like macles of snow, were observed to form near the bottom. 1883All Year Round 17 Nov. 535 A diamond at last, of macle shape, weighing some twenty carats!
2. Min. (See quot. 1865.)
1839Ure Dict. Arts, Macle, is the name of certain diagonal black spots in minerals, like the ace of diamonds in cards. a1852Macgillivray Nat. Hist. Dee Side (1855) 454 Orthoclase..forms large macles in Rubislaw quarries, near Aberdeen. 1865Watts Dict. Chem., Macle is the name given to certain spots in minerals of a deeper hue than the rest; sometimes proceeding from difference of aggregation, sometimes from the presence of a foreign substance; clay-slate, for example, may be macled with iron pyrites. 1872Page Adv. Text-Bk. Geol. vii. 118 Felspar with large macles of mica.
3. = chiastolite.
[1821Jameson Man. Mineral. 318 Chiastolite, Macle, Haüy.] 1821Mawe Catal. Minerals (ed. 4) 99 Chiastolite—Macle, is of a yellowish white colour. 1822Cleaveland Mineral. & Geol. I. 427 The term Macle, as the name of a distinct species, applies to the whitish prisms only. 1862Dana Man. Geol. §60. 58 [Andalusite] often having the interior tesselated with black, in which case it is usually called macle or chiastolite. 1896Chester Dict. Min., Macle, a syn. of chiastolite, alluding particularly to the black centre which a crystal often shows when cut transversely, similar to the mascle of heraldry.
4. Her. = mascle.
1727–41Chambers Cycl., Mascle, or Macle. 1828–40Berry Encycl. Her. I, Macles or Mashes. These terms occur in ancient books of armory, meaning the same as Mascles. 1847Gloss. Heraldry, Macle, see Mascle.
▪ II. macle
Printing: see mackle. |