ectrodactyly
noun
ec·tro·dac·ty·ly
-ˈdak-tə-lē
plural ectrodactylies
: congenital complete or partial absence of one or more fingers or toes and especially the middle digits that is inherited as an autosomal dominant or recessive trait or an X-linked recessive trait or that may occur as a spontaneous mutation
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Merriam-Webster unabridged
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