syn·​dac·​ty·​ly | \(ˌ)sin-ˈdak-tə-lē \

Definition of syndactyly 

: a union of two or more digits that is normal in some animals (such as various marsupials) and that in humans occurs as an inherited condition or as a part of several genetic disorders and is marked by webbing of two or more fingers or toes and sometimes bony fusion of adjacent digits

Examples of syndactyly in a Sentence

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The same may be true of developmental disorders — like syndactyly. Natalie Angier, New York Times, "A Family’s Shared Defect Sheds Light on the Human Genome," 9 Jan. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'syndactyly.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of syndactyly

1864, in the meaning defined above

History and Etymology for syndactyly

New Latin syndactylia, from syn- + Greek daktylos finger

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The first known use of syndactyly was in 1864

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More Definitions for syndactyly


syn·​dac·​ty·​ly | \-lē \
plural syndactylies

Medical Definition of syndactyly 

: a union of two or more digits that is normal in many birds (as kingfishers) and in some lower mammals (as the kangaroos) and that occurs in humans often as a hereditary disorder marked by the joining or webbing of two or more fingers or toes

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