trad
adj.— «He assured me that what he collects—and plays—is traditional, or “trad,” jazz. I told him I call it Dixieland. He called my terminology “unfortunate,” adding, “Eddie Condon hated the term Dixieland.” That should settle it.» —“‘Trad’ gift proves to be especially rewarding” by Jim Collins News-Herald (Willoughby, Ohio) Jan. 25, 2009. (source: Double-Tongued Dictionary)
Further reading
The word filibuster has a long and colorful history, going back to the days when pirates roamed the high seas. Today it refers to hijacking a piece of legislation. Plus, the language of yoga teachers: When doing a guided meditation, you may hear...
An anadrome is a word that forms a whole new word when you spell it backwards. For example, the word “stressed” spelled backwards is “desserts.” Some people’s first names are anadromes. There’s the girl named Noel...
In OED2 from 1956.