Nouns denoting two and three dimensional shapes
- prick
- a depression scratched or carved into a surface
- altitude
- the perpendicular distance from the base of a geometric figure to the opposite vertex (or side if parallel)
- lemniscate
- any of several plane algebraic curves in the shape of a figure eight
- double helix
- a pair of parallel helices intertwined about a common axis
- buckle
- a shape distorted by twisting or folding
- bifurcation
- the place where something divides into two branches
- rhombohedron
- a parallelepiped bounded by six similar faces (either rhombuses or parallelograms)
- vector
- a straight line segment whose length is magnitude and whose orientation in space is direction
- spherule
- a small sphere
- three-dimensional figure
- a three-dimensional shape
- triangle
- something approximating the shape of a triangle
- pocket
- a hollow concave shape made by removing something
- eccentricity
- (geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis
- perversion
- a curve that reverses the direction of something
- straight line
- a line traced by a point traveling in a constant direction; a line of zero curvature
- crease
- an angular or rounded shape made by folding
- decahedron
- any polyhedron having ten plane faces
- regular dodecahedron
- a dodecahedron with twelve regular pentagons as faces
- angle
- the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians
- washout
- the channel or break produced by erosion of relatively soft soil by water
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