- didactylism
- Congenital condition of having only two fingers on a hand or two toes on a foot. [G. di-, two, + daktylos, finger or toe]
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di·dac·tyl·ism (di-dakґtəl-iz-əm) [di- + daktyl- + -ism] the condition of having only two digits on a hand or foot.
Medical dictionary. 2011.