patch

(pach )

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1. A small circumscribed area distinct from the surrounding surface in character and appearance.
2. A drug delivery system that enhances the uptake of a medicine through the skin.
3. Any substance or object used to repair a defect in the body.
4. A protective bandage, as for covering an eye.
patchy (pach′ē )

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, adj.
5. A sensor applied to the body and used to measure one of its functions.

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