apioid

from The Century Dictionary.

• noun A plane curve so drawn that the distance of any point in it from a given fixed point, increased by a constant, positive, and proper fraction of its distance from another given fixed point, gives a positive constant. It is that one of a pair of Cartesian ovals which is within the other. See Cartesian.
• noun A solid of revolution shaped something like a pear: a form assumed by a rotating liquid spheroid when the speed becomes too great for the persistence of the ellipsoid which followed the spheroid as the speed increased.