The Collaborative International Dictionary
Monodactylous
Monodactylous \Mon`o*dac"tyl*ous\, a. [Gr. monoda`ktylos; mo`nos single + da`ktylos finger: cf. F. monodactyle.] (Zo["o]l.) Having but one finger or claw.
Wiktionary
monodactylous
a. (context of an animal English) Having a single digit on each limb, especially a single claw that can be used to grasp