Nouns denoting two and three dimensional shapes
- acute angle
- an angle less than 90 degrees but more than 0 degrees
- equator
- a circle dividing a sphere or other surface into two usually equal and symmetrical parts
- parallelogram
- a quadrilateral whose opposite sides are both parallel and equal in length
- facet plane
- the plane of a facet of an object (as of a cube)
- box
- a rectangular drawing
- blob
- an indistinct shapeless form
- sinuosity
- having curves
- scalene triangle
- a triangle with no two sides of equal length
- torus
- a ring-shaped surface generated by rotating a circle around an axis that does not intersect the circle
- bell shape
- the shape of a bell
- hook
- a sharp curve or crook; a shape resembling a hook
- hexagram
- a regular polygon formed by extending each of the sides of a regular hexagon to form two equilateral triangles
- crenature
- one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.)
- caput
- a headlike protuberance on an organ or structure
- angle of reflection
- the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence
- ellipsoid
- a surface whose plane sections are all ellipses or circles
- concave polygon
- a polygon such that there is a straight line that cuts it in four or more points
- regular tetrahedron
- a tetrahedron with four equilateral triangular faces
- perversion
- a curve that reverses the direction of something
- brachium
- (biology) a branching or armlike part of an animal
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