The Collaborative International Dictionary of English v.0.48:

Recurviroster \Re*cur`vi*ros"ter\ (r?*k?r`v?*r?s"t?r), n. [L.
   recurvus bent back + rostrum beack; cf. F. r['e]curvirostre.]
   (Zool.)
   A bird whose beak bends upward, as the avocet.
   [1913 Webster]