Nouns denoting two and three dimensional shapes
- barrel
- a bulging cylindrical shape; hollow with flat ends
- circle
- something approximating the shape of a circle
- doughnut
- a toroidal shape
- plume
- anything that resembles a feather in shape or lightness
- tree
- a figure that branches from a single root
- picture plane
- the plane that is in the foreground of a drawing or painting; coextensive with but different from the objective surface of the work
- tilt angle
- the angle a rocket makes with the vertical as it curves along its trajectory
- cup
- any cup-shaped concavity
- epicycloid
- a line generated by a point on a circle rolling around another circle
- belly
- a part that bulges deeply
- angle of reflection
- the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence
- prominence
- something that bulges out or is protuberant or projects from its surroundings
- quadrangular prism
- a prism whose bases are quadrangles
- spherical triangle
- a spherical polygon formed by the arcs of 3 great circles
- facet plane
- the plane of a facet of an object (as of a cube)
- tesseract
- the four-dimensional analogue of a cube
- ellipsoid
- a surface whose plane sections are all ellipses or circles
- bulb
- anything with a round shape resembling a teardrop
- blob
- an indistinct shapeless form
- convexity
- a shape that curves or bulges outward
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