oligodactyly

https://doi.org/10.1351/goldbook.11030

Congenital occurrence of fewer than the usual number of digits, resulting in humans having fewer than five fingers or toes on a hand or foot.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 786 [Terms] [Paper]