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idempotent

adjective idem·po·tent \ ˈī-dəm-ˌpō-tᵊnt \
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Definition of idempotent

: relating to or being a mathematical quantity which when applied to itself under a given binary operation (such as multiplication) equals itself; also : relating to or being an operation under which a mathematical quantity is idempotent
—

idempotent

noun

Origin and Etymology of idempotent

Latin idem same + potent-, potens having power — more at potent

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