I'm not sure if this belongs here, but I'm wondering if there is a word for a class of circular shapes?
Thinking about this hierarchically:
* Shape * Polygon * Square * Rectangle * ??????? * Circle * Oval
Ok, so mathematically I'm not sure there is a correct answer to my question that's any better than the one Mehper so eloquently explained (round shape). Let's break down what we have so far:
In the blue corner: Noldorin
* Ellipsoid * Ellipse * Circle * Oval
In the red corner: pretty much everyone else
* Oval * Ellipse
Now, my question for the red team is: where does a circle fit in? From what I understand a circle can't be an oval, but a circle is an ellipse. Those two facts make the following untrue:
* Oval * Ellipse * Circle
I'll stick with ellipsoid for now until I hear some better explanation.
Also note this link: http://en.wikipedia.org/wiki/Ellipsoid#Egg_shape
An egg shape, which is an oval (not an ellipse) is comprised of two ellipses. This seems to make an oval a sub-class of an ellipse.
Kindly correct me if I've made any mistakes.