Center: nm (word from the Latin centrum).
The word “center” has many meanings:
I) Point that is in the middle:
1. Interior point (of a circle, of a sphere) equidistant from all points of the circle, of the sphere.
The center of a disc, of a target.
The center of the Earth.
Center of symmetry: point such that all the points of a figure are equidistant from it, two by two.
Center of an ellipse, of a hyperbola.
2. Central part, middle (of any space) (heart...
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