the presence of extra fingers or toes.
Also, hyperdactylism [hahy-per-dak-tl-iz-uhm] , hyperdactyly [hahy-per-dak-tl-ee] .

1900–05; hyper- + Neo-Latin -dactylia -dactyly

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Medical Dictionary

hyperdactyly hy·per·dac·ty·ly (hī'pər-dāk'tə-lē)

See polydactyly.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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