a sheet of glass formed originally in the shape of a cylinder and then divided lengthwise and flattened.
George GlassRead more in this article about some frequently asked questions and fun facts related to our definitions.
Origin of cylinder glass
An Americanism dating back to 1810–20
Also called broad glass.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019