Nouns denoting two and three dimensional shapes

concave polygon
a polygon such that there is a straight line that cuts it in four or more points
 
angularity
a shape having one or more sharp angles
 
bell shape
the shape of a bell
 
rim
the shape of a raised edge of a more or less circular object
 
scoop
a hollow concave shape made by removing something
 
helix angle
the constant angle at which a helix cuts the elements of a cylinder or cone
 
triangle
something approximating the shape of a triangle
 
flexure
an angular or rounded shape made by folding
 
bifurcation
the place where something divides into two branches
 
prismatoid
a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid
 
tree
a figure that branches from a single root
 
striation
any of a number of tiny parallel grooves such as: the scratches left by a glacier on rocks or the streaks or ridges in muscle tissue
 
spheroid
a shape that is generated by rotating an ellipse around one of its axes
 
inclination of an orbit
(astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees
 
conformation
a symmetrical arrangement of the parts of a thing
 
sphere
a three-dimensional closed surface such that every point on the surface is equidistant from the center
 
line of Saturn
a crease on the palm; palmists say it indicates how successful you will be
 
angular distance
the angular separation between two objects as perceived by an observer
 
wart
any small rounded protuberance (as on certain plants or animals)
 
incision
a depression scratched or carved into a surface
 
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