Nouns denoting two and three dimensional shapes
- geodesic
- (mathematics) the shortest line between two points on a mathematically defined surface (as a straight line on a plane or an arc of a great circle on a sphere)
- conoid
- a shape whose base is a circle and whose sides taper up to a point
- quadric
- a curve or surface whose equation (in Cartesian coordinates) is of the second degree
- figure of eight
- a two-dimensionsal figure having the shape of the number eight
- rim
- the shape of a raised edge of a more or less circular object
- cylinder
- a solid bounded by a cylindrical surface and two parallel planes (the bases)
- loop
- anything with a round or oval shape (formed by a curve that is closed and does not intersect itself)
- octagon
- an eight-sided polygon
- perpendicular
- a straight line at right angles to another line
- sag
- a shape that sags
- sinuousness
- having curves
- vector
- a straight line segment whose length is magnitude and whose orientation in space is direction
- asymptote
- a straight line that is the limiting value of a curve; can be considered as tangent at infinity
- flank
- a subfigure consisting of a side of something
- facet plane
- the plane of a facet of an object (as of a cube)
- incurvature
- a shape that curves or bends inward
- cup
- any cup-shaped concavity
- ellipsoid of revolution
- a shape that is generated by rotating an ellipse around one of its axes
- projection
- any solid convex shape that juts out from something
- regular tetrahedron
- a tetrahedron with four equilateral triangular faces
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