I'm not 100 percent sure, but I'm pretty sure that it is half of an ellipse.
Explanation:
For one, if you look at a picture of a hyperbola, you can see that it looks like nothing and is nothing compared to the parabola. However, looking at an ellipse, you can clearly see the resemblance between the two.
Once again, I am not 100 percent certain with this answer, so if you have anything to say about it please let me know.
