1. A concavo-convex glass for covering the dial-plate of a watch; a half-hour glass, for measuring the time of a watch on deck.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• qatch glass,
• aatch glass,
• satch glass,
• eatch glass,
• 3atch glass,
• 2atch glass,
• wztch glass,
• wstch glass,
• wwtch glass,
• wqtch glass,
• warch glass,
• wafch glass,
• wagch glass,
• waych glass,
• wa6ch glass,
• wa5ch glass,
• watxh glass,
• watvh glass,
• watfh glass,
• watdh glass

The adjective form of the term "watch glass" is "watch glassy".

The plural form of "watch glass" is "watch glasses".

The singular form of the word "watch glass" is still "watch glass".