|a fool or simpleton; ninny.|
|a gadget; dingus; thingumbob.|
|See also pigeon hawk a small falcon, Falco columbarius, that has a dark plumage with a black-barred tail: used in falconry|
|[C14: from Old French esmerillon, from esmeril, of Germanic origin]|
In the legends of King Arthur, a magician who acts as Arthur's principal adviser.