The Collaborative International Dictionary of English v.0.48:

Cultirostral \Cul`ti*ros"tral\ (-t?-r?s"tral), a. [See
   Cultirostres.] (Zool.)
   Having a bill shaped like the colter of a plow, or like a
   knife, as the heron, stork, etc.
   [1913 Webster]