Paraboloidho (az parabola va yun. eidos — shakl, namud), sathhoi nomahdudi tartibi duyum, ki marka nadorand. Du namudi Paraboloidho vujud dorad; Paraboloidhoi ellipsi va paraboloidi giperboli. Az 5 navi asosii satkhhoi tartibi duyum dutoash Paraboloidho meboshad. Khathoi burishi Paraboloidho bo hamvorihoi gunoguni fazo giperbola, parabola va khathoi rost meboshand.
Az har yak nuqtai Paraboloihoi giperboli du tashkildihandai rostkhatta meguzarad va az in ru on sathi rakh-rakhro memonad. Baroi Paraboloidhoi ellipsi hamvorihoe mavjudand, ki onro nameburand. Agar hamvori va Paraboloihoi ellipsi hamdigarro burand, khati burish yo ellips va yo parabola meboshad.