types:
bulb
anything with a round shape resembling a teardrop
disc,
disk,
saucer
something with a round shape resembling a flat circular plate
sphere
a three-dimensional 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 ring-shaped 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
tendril
something long, light, slender, and often curling
brake drum,
drum
a hollow cast-iron cylinder attached to the wheel that forms part of the brakes
core,
magnetic core
(computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories
shank
cylinder forming the part of a bit by which it is held in the drill
shank
cylinder forming the part of a bolt between the thread and the head
shank,
stem
cylinder forming a long narrow part of something
stalactite
a cylinder of calcium carbonate hanging from the roof of a limestone cave
stalagmite
a cylinder of calcium carbonate projecting upward from the floor of a limestone cave
corolla
(botany) the whorl of petals of a flower that collectively form an inner floral envelope or layer of the perianth
calyx
(botany) the whorl of sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing and supporting the developing bud; usually green
barrel,
drum
a bulging cylindrical shape; hollow with flat ends
verticil
a whorl of leaves growing around a stem