Dactyly

Human hand anatomy
Human hand anatomy (pentadactyl)

In biology, dactyly is the arrangement of digits (fingers and toes) on the hands, feet, or sometimes wings of a tetrapod animal. The term is derived from the Greek word δακτυλος (dáktylos) meaning "finger."

Sometimes the suffix "-dactylia" is used. The derived adjectives end with "-dactyl" or "-dactylous."