watch-glass

British  

noun

1. a curved glass disc that covers the dial of a watch

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

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Example Sentences

See Examples For:

watch-glass

The appliance known as Buller’s shield, a watch-glass strapped down by plaster, is the best for this purpose.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" by Various

He divided, across their middles, two specimens of Hydra fusca, and then, in a watch-glass, applied the upper end of one to the lower end of the other.

From The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development by Hertwig, Oscar

Wilcox is particularly strong on the manner in which the lad contrived to kindle a fire by using his watch-glass filled with water as a burning-glass.

From With Cochrane the Dauntless by Henty, G. A. (George Alfred)

Thus, from a medium-sized negative, I have obtained negatives four times larger than the original, and other impressions reduced thirty times, capable of figuring on a watch-glass, brooch, or ring.

From Notes and Queries, Number 194, July 16, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc by Bell, George

If the drop is large, place it face upward on the rubber mat, cover it with an inverted watch-glass, and allow it to dry.

From The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. by Eyre, J. W. H. (John William Henry)