syndactyly

The condition of having two or more fused digits, as occurs normally in certain mammals and birds.

A congenital anomaly in humans marked by webbing or fusion of the fingers or toes.

Syndactylism.

The normal condition, in some animals and birds, of having fused digits.

The anomalous condition, in humans, of having some fingers or toes fused with a web.

birth defect in which there is partial or total webbing connecting two or more fingers or toes