| 释义 |
ˈwatch-glass
[watch n.]
†1. A sand-glass or hour-glass used to measure the time of keeping watch, esp. on board ship. Also in fig. context. Obs.
1637Rutherford Lett. cclxxvi. (1891) 534 Time and tide carry us upon another life, and there is daily less and less oil in our lamps, and less and less sand in our watch-glass. 1701Tuttell & Moxon Math. Instr. 22 Watch-glass..used at Sea, to shift or change their Watches. 1769Falconer Dict. Marine (1780), Watch-glasses, a name given to the glasses employed to measure the period of the watch or divide it into any number of equal parts..so that the several stations therein may be regularly kept and relieved.
2. A thin piece of glass, usually concavo-convex in form, fitted into the case of a watch over the dial-plate.
1773Pennsylv. Gaz. 16 June, Suppl. 2/2 [Advt.] Watch glasses. 1831Brewster Optics i. 4 A concave speculum is one which is hollow like the inside of a watch-glass. 1894F. J. Britten Former Clock & Watchm. 64 Watch glasses seem to have been introduced about 1600.
attrib.1859J. R. Greene Protozoa vii. 66 In Ophryoglena flavicans a remarkable body termed the ‘watch-glasslike organ’ has been recently observed by Lieberkühn.
b. as a receptacle for small objects or portions of material to be subjected to scientific observation.
1757Phil. Trans. L. 286 Pieces of these should be cut off while they are in the sea water, and placed in watch-glasses full of the same. 1818Accum Chem. Tests 97 A small evaporating basin, or watch glass. 1880L. S. Beale How to work with Microscope (ed. 5) 54 Watch Glasses of various sizes should be kept by every observer. 1888Rutley Rock-Forming Min. 24 A watch-glass standing in a pill-box lid.
Hence ˈwatch-glassful.
1830Sir J. Herschel Disc. Study Nat. Philos. ii. vi. §182 (1851) 172 We almost forget that these great masses are made up of watch-glassfuls. |