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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

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Read more in this article about some frequently asked questions and fun facts related to our definitions.

Read more in this article about some frequently asked questions and fun facts related to our definitions.

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

Historical Examples of watch-glass

A bit of the culture is removed and placed in a watch-glass of water.
The Fundamentals of Bacteriology
Charles Bradfield Morrey
The edges are now ground off, and the watch-glass is complete.
Harper's New Monthly Magazine, No. IX.--February, 1851.--Vol. II.
Various
A little of the supernatant ether is now removed to a small glass capsule or watch-glass, and allowed to evaporate spontaneously.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I
Arnold Cooley
In form, it is circular, convexo-concave, and resembles a watch-glass.
A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition)
Calvin Cutter
There's no more glass about you than there is about me—and that is my watch-glass.
Wilson's Tales of the Borders and of Scotland
Various