Nouns denoting two and three dimensional shapes

facet plane
the plane of a facet of an object (as of a cube)
 
perpendicular
a straight line at right angles to another line
 
chord
a straight line connecting two points on a curve
 
AZ
the azimuth of a celestial body is the angle between the vertical plane containing it and the plane of the meridian
 
acute angle
an angle less than 90 degrees but more than 0 degrees
 
rhombohedron
a parallelepiped bounded by six similar faces (either rhombuses or parallelograms)
 
fissure
a long narrow depression in a surface
 
pyramid
a polyhedron having a polygonal base and triangular sides with a common vertex
 
angle of refraction
the angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction
 
perigon
an angle of 360 degrees
 
leaf shape
any of the various shape that leaves of plants can assume
 
keel
a projection or ridge that suggests a keel
 
prismoid
a prismatoid whose bases are polygons having the same number of sides and whose other faces are trapezoids or parallelograms
 
polyhedron
a solid figure bounded by plane polygons or faces
 
wart
any small rounded protuberance (as on certain plants or animals)
 
dodecahedron
any polyhedron having twelve plane faces
 
geodesic line
(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)
 
base
the bottom side of a geometric figure from which the altitude can be constructed
 
point
a very small circular shape
 
bifurcation
the place where something divides into two branches
 
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