Nonesuch n. A person or thing of a sort that there is no other such; something extraordinary; a thing that has not its equal. It is given as a name to various objects, as to a choice variety of apple, a species of medic (Medicago lupulina), a variety of pottery clay, etc.
... incident, of the nonsensical recital, are found in the scene in 'Huckleberry Finn' dealing with the performance of the King's Cameleopard or Royal Nonesuch, the address on the occasion of the dinner in honour of the seventieth anniversary of John Greenleaf Whittier (an historic failure), and the Turkish bath in 'The ... — Mark Twain • Archibald Henderson