The Collaborative International Dictionary of English v.0.48:

Hemidactyl \Hem`i*dac"tyl\, n. [See Hemi-, and Dactyl.]
   (Zool.)
   Any species of Old World geckoes of the genus Hemidactylus.
   The hemidactyls have dilated toes, with two rows of plates
   beneath.
   [1913 Webster]