Webster's Revised Unabridged Dictionary · 1913

Tiffany

Tiffany , noun

[Old English tiffenay; compare Old French tiffe ornament, tiffer to adjust, adorn. See Tiff to dress.]

A species of gause, or very silk.
The smoke of sulphur... is commonly used by women to whiten tiffanies. — Sir T. Browne

Tiffany , adjective

[After Louis Comfort Tiffany.]

1.
made of stained glass by, or in the style of objects made by, Louis C. Tiffany; as, a Tiffany lamp.
2.
Made by or purchased from the Tiffany corporation (with headquarters in New York City); as, Tiffany jewelry.