A runcible spoon is a utensil that appears in nonsense poetry, which also uses the adjective "runcible" to describe objects other than spoons. It is considered by some to be a nonsense word.
Edward Lear's best-known poem, The Owl and the Pussycat, published in 1871, includes the passage:
They dined on mince and slices of quince, which they ate with a runcible spoon.
Lear does not appear to have had any firm idea of what the word "runcible" means. His whimsical nonsense verse celebrates words primarily for their sound, and a specific definition is not needed to appreciate his work. However, since the 1920s (several decades after Lear's death), modern dictionaries have generally defined a runcible spoon to be a fork with three broad curved prongs and a sharpened edge, used with pickles or hors d'oeuvres, such as a pickle fork.
Notwithstaninding its apparent nonesense associations it is used in C J Sansom's nopvel 'Dissolution':-
“This evening he stayed to dine at the obedentiaries’ table, where a great haunch of beef was served with runcible peas.”