17-Cusp

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noun [cusp]

FULL DEFINITION

-point, apex, or turning point of *

*a point of transition

*a horn of a crescent moon

*a fixed point on a mathematical curve at which a point tracing the curve would exactly reverse its direction of motion

*an ornamental pointed projection formed by or arising from the intersection of two arcs or foils

*a point on the grinding surface of a tooth

SYNONYMS: brink, point, edge, threshold, verge

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