Definitions
1.nounNavel
2.nounHilum
3.nounA depression or opening in the center of the base of many spiral shells.
4.nounEither of the two apertures in the calamus of a feather.
5.nounA tube connecting an astronaut or spacecraft to the mothership, through which supplies and samples can be transferred.
6.nounOne of the foci of an ellipse or other curve.
7.nounA point of a surface at which the curvatures of the normal sections are all equal to each other."A sphere may be osculatory to the surface in every direction at an umbilicus."
8.nounAn ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled.