One of the mysteries of the English language finally explained.
Having five fingers or toes on each limb; pentadactyl.
Early 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. From ancient Greek πενταδάκτυλος five-fingered or toed, five-pointed, also as noun denoting cinquefoil (from πεντα- + δάκτυλος) + -ous.
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