Nouns denoting two and three dimensional shapes
- hyperboloid
- a quadric surface generated by rotating a hyperbola around its main axis
- oblique angle
- an angle that is not a right angle or a multiple of a right angle
- hexahedron
- any polyhedron having six plane faces
- sinusoid
- the curve of y=sin x
- oblique triangle
- a triangle that contains no right angle
- complex plane
- a geometric representation of the complex numbers established by the real axis and the orthogonal imaginary axis; it can be thought of as a modified Cartesian plane, with the real part of a complex number represented by a displacement along the x-axis, and the imaginary part by a displacement along the y-axis
- sinuousness
- having curves
- amorphous shape
- an ill-defined or arbitrary shape
- quadric surface
- a curve or surface whose equation (in Cartesian coordinates) is of the second degree
- taper
- a convex shape that narrows toward a point
- regular icosahedron
- an icosahedron with twenty equilateral triangles as faces
- altitude
- the perpendicular distance from the base of a geometric figure to the opposite vertex (or side if parallel)
- spur
- any sharply pointed projection
- verticil
- a whorl of leaves growing around a stem
- epicycloid
- a line generated by a point on a circle rolling around another circle
- angle of dip
- (physics) the angle that a magnetic needle makes with the plane of the horizon
- pencil
- a figure formed by a set of straight lines or light rays meeting at a point
- trapezoid
- a quadrilateral with two parallel sides
- uncus
- (biology) any hook-shaped process or part
- prolate cycloid
- a cycloid generated by a point outside the rolling circle
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