1) Birth defect 2) Congenital abnormality 3) Congenital anomaly 4) Congenital defect 5) Congenital disorder 6) Syndactyly 1) Syndactyly 
Synonym for syndactyly ... <clinical sign, embryology> Webbing between the digits of the hands or feet. ... (27 Sep 1997) ... 
The condition in which two or more toes are more or less completely grown together or adherent