watch-glass

noun

a curved glass disc that covers the dial of a watch

a similarly shaped piece of glass used in laboratories for evaporating small samples of a solution, etc

Nearby words

watch night, watch one's step, watch out, watch over, watch pocket, watch-glass, watchable, watchband, watchcase, watchdog, watched pot never boils, a

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for watch-glass

I also left others in a watch-glass, which was placed under a bell-jar enclosing several ferns.
Parasites|T. Spencer Cobbold
The impression may be made on a window-pane, a watch-glass, or even an eye-glass, if nothing better is at hand.
Finger Prints|Francis Galton
"Get me my watch-glass from the work bench," said Gilbert, his hands trembling with expectation.
Poppea of the Post-Office|Mabel Osgood Wright
The precipitate, having been dried, is transferred to a watch-glass.
A Textbook of Assaying: For the Use of Those Connected with Mines.|Cornelius Beringer and John Jacob Beringer

The tube is then held over a watch-glass, or a slide, upon which the water and object will fall on removing the fore finger.
An Elementary Text-book of the Microscope|John William Griffith