watch glass

watch glass

n.

1. A shallow glass dish used as a beaker cover or evaporating surface.

2. A concavo-convex glass or plastic disk used to cover the face of a watch.

Thesaurus

Noun	1.	watch glass - laboratory glassware; a shallow glass dish used as an evaporating surface or to cover a beaker dish - a piece of dishware normally used as a container for holding or serving food; "we gave them a set of dishes for a wedding present"
	2.	watch glass - a protective cover that protects the face of a watch watch crystal, crystal protective cover, protective covering, protection - a covering that is intend to protect from damage or injury; "they had no protection from the fallout"; "wax provided protection for the floors" watch, ticker - a small portable timepiece