Vertex



GRE Barron

解释

GRE 红宝书

• n. ( 三角形等) 顶角; 顶点
• ［英］ n. ( 三角形等) 顶角; 顶点 ( highest point;summit)
• ［记］ a monument on the vertex of the hill ( 山顶上的一座纪念碑)
• ［例］ a monument on the vertex of the hill ( 山顶上的一座纪念碑)

Webster Collegiate

noun (plural vertices; also vertexes)

• Etymology: Middle English, top of the head, from Latin vertic-, vertex, vortic-, vortex whirl, whirlpool, top of the head, summit, from vertere to turn
• Date: 14th century
• 1. the top of the head
• 2.
  • a. the point opposite to and farthest from the base in a figure
  • b. a point (as of an angle, polygon, polyhedron, graph, or network) that terminates a line or curve or comprises the intersection of two or more lines or curves
  • c. a point where an axis of an ellipse, parabola, or hyperbola intersects the curve itself
• 3. a principal or highest point ; summit <the vertex of the hill>

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