syndactylus

[ sin-dak-tuh-luh s ]
/ sɪnˈdæk tə ləs /

noun, plural syn·dac·ty·li [sin-dak-tuh-lahy, -lee] /sɪnˈdæk təˌlaɪ, -ˌli/. Medicine/Medical.

a person having united or webbed fingers or toes.

Origin of syndactylus

< New Latin, noun use of the adj.: having webbed digits; see syn-, -dactylous