hyperdactyly

/ˌhaɪpərˈdæktəli/
noun
  1. A medical condition in which a person is born with more than the usual number of fingers or toes.
    • Hyperdactyly can sometimes be corrected with surgery early in life.
    • The doctor explained that hyperdactyly is a rare genetic variation.
    • The baby was diagnosed with hyperdactyly, having six fingers on each hand.
Synonyms