Толковый словарь английского языка Oxford English Reference - vertex
Vertex
vertex
n. (pl. vertices or vertexes) 1 the highest point; the top or apex. 2 Geom. a each angular point of a polygon, polyhedron, etc. b a meeting-point of two lines that form an angle. c the point at which an axis meets a curve or surface. 3 Anat. the crown of the head. Etymology: L vertex -ticis whirlpool, crown of a head, vertex, f. vertere turn
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noun (plural vertices; also ~es) Etymology: Middle English, top of the head, from Latin vertic-, ~, vortic-, vortex whirl, whirlpool, top of the head, summit, from vertere to turn Date: 14th century the top of the head, 2. the point opposite to and farthest from the base in a figure, 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, a point where an axis of an ellipse, parabola, or hyperbola intersects the curve itself, a principal or highest point ; summit ...Толковый словарь английского языка
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