Merriam-Webster Collegiate Dictionary - tiff

 I. intransitive verb  Etymology: origin unknown  Date: 1700 to have a petty quarrel  II. noun  Date: 1754 a petty quarrel TIFFANY  noun  (plural -nies)  Etymology: perhaps from obsolete French tiphanie Epiphany, from Late Latin theophania, from Late Greek, ultimately from Greek theos god + phainein to show  Date: 1601  1. a sheer silk gauze formerly used for clothing and trimmings  2. a plain-woven open-mesh cotton fabric (as cheesecloth) TIFFANY  I. adjective  Date: 1936 being glass or an article of glass made by or in the manner of Louis C. ~; especially made of pieces of stained glass a ~-style lamp a ~ window  II. biographical name Charles Lewis 1812-1902 American jeweler  III. biographical name Louis Comfort 1848-1933 son of C.L. American painter & stained-glass artist