noun (plural vertices /-təˌsēz/ or vertexes)
1The highest point; the top or apex.
- But what vertices of anxiety lie behind the gentle opposition of town and country, youth and age when Janice arrives in Dulwich.
- Balancing on the vertex requires enormous training in concentration.
- The game begins at one particular vertex, corresponding to the starting position of the game.
1.1 Anatomy The crown of the head.
- This will protect the perineum and assist in extension of the head as the vertex passes the symphysis.
- As the head clears the pubic symphysis, the vertex is pulled upward at an angle of 45 degrees to the floor.
- She has been left with extensive scars and areas of alopecia on the vertex, occipital, and right parietal regions of her head.
2 Geometry Each angular point of a polygon, polyhedron, or other figure.
- Einstein observes that the Menelaus theorem is symmetric with respect to the vertices of the triangle.
- Now add parallels beyond those in the same direction, through the vertices of the largest triangle.
- He also found another solution where the three bodies were at the vertices of an equilateral triangle.
2.1A meeting point of two lines that form an angle.
- Bond angles are calculated using the central atom as the vertex of the bond angle.
- An undirected edge connecting these two vertices indicates this relationship.
- Two adjacent vertices must be of the same colour.
2.2The point at which an axis meets a curve or surface.
- Each vertex unit can have one vector and one scalar operation in flight simultaneously.
- A graph is a mathematical structure consisting of vertices connected by edges.
- A coin may only be placed by dragging the cursor along an edge from one vertex to another.
Late Middle English: from Latin, 'whirlpool, crown of a head, vertex', from vertere 'to turn'.
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