A point is a geometric element that has position but no extension. It is an exact fixed location having no length, width, or depth.
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point is also known as dot.
The Geometrical meaning of the second derivative is the curvature of the function. If the function has zero second derivative it is straight or flat.
A point.
A geometrical ray has one point and the other side extends infinitely in one direction.
The cross product can be said to be a measure of the 'perpendicularity' of the vectors in the product. Please see the link.