From Brewer:
Runcible Spoon (A). A horn spoon with a bowl at each end, one the size of a table-spoon and the other
the size of a tea-spoon. There is a joint midway between the two bowls by which the bowls can be folded
over.
I thought this was a coinage of Edward Lear, in poem Owl and Pussycat. But if this were so, I would
think Brewer would have known it.