Nouns denoting two and three dimensional shapes
- vacancy
- an empty area or space
- pellet
- a small sphere
- element of a cylinder
- a straight line running the length of the cylinder
- obtuse angle
- an angle between 90 and 180 degrees
- perigon
- an angle of 360 degrees
- cuboid
- a rectangular parallelepiped
- circle
- ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point
- natural shape
- a shape created by natural forces; not man-made
- prolate cycloid
- a cycloid generated by a point outside the rolling circle
- epicycle
- a circle that rolls around (inside or outside) another circle; generates an epicycloid or hypocycloid
- dimple
- any slight depression in a surface
- element of a cone
- a straight line joining the apex and a point on the base
- tongue
- any long thin projection that is transient
- tower
- anything that approximates the shape of a column or tower
- tip
- a V shape
- arc
- something curved in shape
- octahedron
- any polyhedron having eight plane faces
- washout
- the channel or break produced by erosion of relatively soft soil by water
- cutting angle
- the angle between the face of a cutting tool and the surface of the work
- rectangle
- a parallelogram with four right angles
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