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From Longman Dictionary of Contemporary English
Related topics: Maths
vertexver‧tex /ˈvɜːteks $ ˈvɜːr-/ noun (plural vertices /-təsiːz/ or vertexes) [countable] technical  HMCFthe point where two lines meet to form an angle, especially the point of a triangle
Examples from the Corpus
vertexJust like the cube standing on a vertex, discussed in Chapter 7.Each vertex may have a number of edges emanating from it.Burning in vertex of head with coldness in the forehead.A is the vertex and F is the focus.This locates the vertex of both tractrix and catenary and their vertical axis of symmetry can be erected.That portion of the epicranium which lies immediately behind the frons and between the compound eyes is termed the vertex.The vertex passes through O and the focus is on the y axis at & a /4;.The feet, eyes, ears, nose, throat, vertex of head, stomach, chest all burn.
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