A kind of opalescent colored glass that was used in the early 1900s for stained-glass windows and lamps WordNet 3.0 & Open English WordNet

Tiffany glass refers to the many and varied types of glass developed and produced from 1878 to 1933 at the Tiffany Studios in New York City, by Louis Comfort Tiffany and a team of other designers, including Clara Driscoll, Agnes F. Northrop, and Frederick Wilson. Wikipedia

Varied types of glass developed at the Tiffany Studios in New York Wikidata

Any of various types of ornamental glass developed and produced from 1878 to 1933 at the Tiffany Studios in New York. Wiktionary