watch glass

Definition of Watch Glass in English :

1. watch glass

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

2. crystal, watch crystal, watch glass

a protective cover that protects the face of a watch

WordNet Lexical Database for English. Princeton University. 2010.

Watch Glass

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

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.