Mean peak rare (or deformed). Word is formed from the Greek roots xenos (weird, deformed) and ops (peak). It is the name of a genus of birds belonging to the family Furnariidae. They are called picoleznas, piquivueltos, piquitorcidos.
Xenops: A genus of passerine birds of the family of the ovenbirds whose species inhabit the Neotropics and are called picoleznas or piquivueltos.