The Collaborative International Dictionary of English v.0.48:

Macrodactyl \Mac`ro*dac"tyl\ (m[a^]k`r[-o]*d[a^]k"t[i^]l), n.
   [Gr. makroda`ktylos long-fingered; makro`s long + da`ktylos
   finger: cf. F. macrodactyle.] (Zool.)
   One of a group of wading birds (Macrodactyli) having very
   long toes. [Written also macrodactyle.]
   [1913 Webster] Macrodactylic