Adding a Dimension (Tricky)

nightbat I can't find my post "Universe,and the onion" Could I
relate the rings of an onion having each ring a dimension. Is the
center of an onion a "point"? Is the center of a black hole a "point"?
Is the center of the universe a "point"? Does a point have more than
one dimension? How does the shape of a string create so many more
dimensions in the submicroscopic realm? Was the universe created out of
the realm of one dimension? Tricky stuff Go figure
TreBert