an·i·so·dac·tyl 
(ăn-ī′sō-dăktəl, ăn′ĭ-)
(ăn-ī′sō-dăktəl, ăn′ĭ-)adj. also an·i·so·dac·ty·lous (-tə-ləs)
Having three toes projecting forward and one projecting backward, as in the passerine birds.
n.
An anisodactyl bird, such as a warbler.
[AN- + ISO- + -DACTYL.]
an·i′so·dacty·ly (-tə-lē) n.