snark

1. The fictional creature of Lewis Carroll's poem, used allusively to refer to fruitless quest or search. (literary)
2. A graph in which every node has three branches, and the edges cannot be coloured in fewer than four colours without two edges of the same colour meeting at a point.
3. A fluke or unrepeatable result or detection in an experiment. · Cabrera's Valentine's Day monopole detection or some extremely energetic cosmic rays could be examples of snarks.

Çoğul snarks