In biology, dactyly's the arrangement of (fingers and toes) on the hands, feet, or sometimes wings of a tetrapod animal. It comes from the Greek word δακτυλος = "finger". Sometimes the ending "-dactylia"'s used. The derived adjectives end with "-dactyl" or "-dactylous". Pentadactyly Pentadactyly (from Greek pente-="five" plus δακτυλος = "finger")'s the condition of having five digits on each limb. It's believed that… (More on Dactyly)