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Definition of Cusp

Cusp: In reference to heart valves, one of the triangular segments of the valve which opens and closes with the flow of blood. In reference to teeth, a raised area of the biting surface.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=2884
Last Editorial Review: 8/28/2013

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