cusp

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Noun cusp has 3 senses

cusp - point formed by two intersecting arcs (as from the intrados of a Gothic arch)
--₁ is a kind of point
cusp, leaflet - a thin triangular flap of a heart valve
--₂ is a kind of flap
--₂ is a part of heart valve, cardiac valve
cusp - small elevation on the grinding surface of a tooth
--₃ is a kind of point, tip, peak
--₃ is a part of tooth

cushy cusin cusiness cusions cusip cusk-eel cusk cuson cusp cuspate cuspated cusped cuspid cuspidal cuspidate cuspidated cuspidation

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