When I was researching my about-to-be-published A Glossary of Colonial American Words (Lederer's Lexicon) I encountered only a handful for which I could not find definitions in the many sources available. Perhaps some of Word Ways readers can come up with definitions. Here are the stumpers.
Lederer, Richard M. Jr.
"A Lexicographer's Search,"
Word Ways: Vol. 16
, Article 17.
Available at: http://digitalcommons.butler.edu/wordways/vol16/iss3/17