In biology,<unk>  is the arrangement of digits (fingers and toes) on the hands, feet, or sometimes wings of a tetrapod animal.  It comes from the Greek word δακτυλος = "finger".
Dactyly
Polydactyly
Brachydactyly
Pitted nails
Webbed toes
Elfin facies
Tripe palms
Erlenmeyer flask deformity