syndactyly

noun2

1. •
   The normal condition, in some animals and birds, of having fused digits.
2. •
   The anomalous condition, in humans, of having some fingers or toes fused with a web.

   • Pranamya Menaria (India; born August 10, 2005) has 25 in total (12 fingers and 13 toes). This is as a result of the condition Polydactyly and Syndactyly. — 2008