| 单词 | singing glass | 
| 释义 | > as lemmassinging glass   singing glass  n. (See quot. 1875). ΘΚΠ the world > physical sensation > hearing and noise > degree, kind, or quality of sound > resonance or sonority > 			[noun]		 > echo chamber or instrument whispering-placea1661 singing glass1669 sound-board1766 sounding-board1766 whispering-gallery1812 reverberation chamber1925 echo room1933 echo chamber1937 1669    S. Pepys Diary 23 Feb. 		(1976)	 IX. 457  				I had one or two singing-glasses made, which make an echo to the voice, the first that ever I saw. 1792    G. Galloway Poems 34  				To see..Mr Cartwright's singing glasses. 1875    E. H. Knight Amer. Mech. Dict. III. 2187/1  				Singing-glass, a thin, sonorous glass vessel, which yields an echo when vibrated by a sound. < as lemmas | 
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