hyperdactylia

[hahy-per-dak-til-ee-uh]

noun

the presence of extra fingers or toes.

Also hy·per·dac·tyl·ism

[hahy-per-dak-tl-iz-uh m] /ˌhaɪ pərˈdæk tlˌɪz əm/, hy·per·dac·ty·ly

[hahy-per-dak-tl-ee] /ˌhaɪ pərˈdæk tl i/.

Origin of hyperdactylia

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018