glass having a red color resulting from the addition of gold, copper, or selenium to the batch.
any glass of a dark red color.
Origin of ruby glass
First recorded in 1790–1800
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
glass that has a deep rich red colour produced from oxides of various minerals, such as lead, copper, and iron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012