Runcible

[1] The word "runcible" was apparently one of Lear's favourite inventions, appearing in several of his works in reference to a number of different objects.

[8] Edward Lear's best-known poem, The Owl and the Pussy-Cat, published in 1870, includes the passage: They dined on mince and slices of quince, which they ate with a runcible spoon.

[1] Another mention of this piece of cutlery appears in Edward Lear's alphabetical illustrations Twenty-Six Nonsense Rhymes and Pictures.

His whimsical nonsense verse celebrates words primarily for their sound, and a specific definition is not needed to appreciate his work.

The Straight Dope adds that "modern students of runciosity" link the word in a different way to Roncevaux: The obsolete adjective "rouncival" (an alternative spelling of rounceval), meaning "gigantic", also derives from Roncevaux, either by way of a certain large variety of pea grown there, or from a once-current find of gigantic fossilized bones in the region.