garden glass

plural garden glasses

1. A globe of dark-coloured glass, mounted on a pedestal, to reflect surrounding objects; much used as an ornament in gardens in Germany.
2. datedA cloche (normally bell-shaped glass, used for covering plants).

   With this implement we aimed high and low, shot blackbirds thirty yards off, cut up the shrubs, and broke cucumber-lights and hidden garden-glasses

   1864, Harry Jones, Holiday Papers

   1 more example

   for want of frames or any ſort of garden glasses, we often preferve cauliflower plants through the winter in a bed of common earth, covered occasionally with garden mats

   1791, Thomas Mawe, Every Man His Own Gardener