paraboloid

The story

1. Proto-Indo-European*per-
2. Proto-Indo-European*preh₂-
3. Proto-Hellenic*pərai
4. Ancient Greekπᾰρᾰ́ (părắ)
5. Ancient Greekπαρα- (para-)
6. Proto-Indo-European*gʷelH-
7. Proto-Hellenic*gʷəlnō
8. Ancient Greekβάλλω (bállō)
9. Ancient Greekπαραβάλλω (parabállō)
10. Ancient Greekπαραβολή (parabolḗ)
11. New Latinparabola
12. Englishparabola
13. Proto-Indo-European*weyd-
14. Proto-Indo-European*wéydos
15. Proto-Hellenic*wéidos
16. Ancient Greekεἶδος (eîdos)
17. English todayparaboloid

From parabola + -oid.