round shape
Noun

A shape that is curved and without sharp angles (synset 113888104)
hyponym:
 bulb  anything with a round shape resembling a teardrop
 cone, cone shape, conoid  a shape whose base is a circle and whose sides taper up to a point
 disc, disk, saucer  something with a round shape resembling a flat circular plate
 coil, curl, curlicue, gyre, ringlet, roll, scroll, whorl  a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
 convolution, swirl, vortex, whirl  the shape of something rotating rapidly
 ellipsoid of revolution, spheroid  a shape that is generated by rotating an ellipse around one of its axes
 sphere  a threedimensional closed surface such that every point on the surface is equidistant from the center
 sphere  a solid figure bounded by a spherical surface (including the space it encloses)
 cylinder  a surface generated by rotating a parallel line around a fixed line
 toroid, torus  a ringshaped surface generated by rotating a circle around an axis that does not intersect the circle
 rim  the shape of a raised edge of a more or less circular object
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