Definitions for watch glass
watch glass

Princeton's WordNetRate this definition:2.0 / 2 votes

1. watch glassnoun

   laboratory glassware; a shallow glass dish used as an evaporating surface or to cover a beaker

2. crystal, watch crystal, watch glassnoun

   a protective cover that protects the face of a watch

WiktionaryRate this definition:0.0 / 0 votes

1. watch glassnoun

   An item of glass laboratory equipment consisting of a simple slightly concave circle of glass. It is a general utility item, used to hold small samples, to evaporate liquids, to cover a beaker, and so on.

WikipediaRate this definition:0.0 / 0 votes

1. Watch glass

   A watch glass is a circular concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, for heating a small amount of substance and as a cover for a beaker. A larger watchglass may be referred to as a clockglass. The latter use is generally applied to prevent dust or other particles entering the beaker; the watch glass does not completely seal the beaker, so gas exchanges still occur. When used as an evaporation surface, a watch glass allows closer observation of precipitates or crystallization, and can be placed on a surface of contrasting color to improve the visibility overall. Watch glasses are also sometimes used to cover a glass of whisky, to concentrate the aromas in the glass, and to prevent spills when the whisky is swirled. Watch glasses are named so because they are similar to the glass used for the front of old-fashioned pocket watches. In reference to this, large watch glasses are occasionally known as clock glasses.

ChatGPTRate this definition:0.0 / 0 votes

1. watch glass

   A watch glass is a circular, slightly concave piece of glass used in chemistry labs as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for a beaker. It is named for its similarity in shape to the glass cover of a pocket watch.

WikidataRate this definition:1.0 / 1 vote

1. Watch glass

   A watch glass is a circular, slightly convex-concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for a beaker. The latter use is generally applied to prevent dust or other particles entering the beaker; the watch glass does not completely seal the beaker, and so gas exchanges still occur. When used as an evaporation surface, a watch glass allows closer observation of precipitates or crystallisation, and can be placed on a surface of contrasting colour to improve the visibility overall. Watch glasses are also sometimes used to cover a glass of whisky, to concentrate the aromas in the glass, and to prevent spills when the whisky is swirled. Watch glasses are so named because they are similar to the glass used for the front of old-fashioned pocket watches. In reference to this, large watch glasses are occasionally known as clock glasses.

Matched Categories

1. • Dish
   • Protective Covering

How to pronounce watch glass?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say watch glass in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of watch glass in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of watch glass in Pythagorean Numerology is: 5

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=watch glass
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Watch_Glass
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Watch_Glass
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=watch glass