pap·il·lon 
(păpə-lŏn′, pä′pē-yôɴ)
(păpə-lŏn′, pä′pē-yôɴ)n.
A dog of a toy spaniel breed developed in Europe, having a long silky coat, a bushy tail that curves over the back, and large ears shaped like the wings of a butterfly.
[French, from Old French, butterfly, from Latin pāpiliō, pāpiliōn-; see PAVILION.]
papillon