Nouns denoting two and three dimensional shapes

regular tetrahedron
a tetrahedron with four equilateral triangular faces
 
curlicue
a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
 
box
a rectangular drawing
 
belly
a part that bulges deeply
 
angle of incidence
the angle that a line makes with a line perpendicular to the surface at the point of incidence
 
polygon
a closed plane figure bounded by straight sides
 
chord
a straight line connecting two points on a curve
 
disproportion
lack of proportion; imbalance among the parts of something
 
interior angle
the angle inside two adjacent sides of a polygon
 
spur
any sharply pointed projection
 
orbital plane
(astronomy) the plane on which a body is orbiting
 
tree diagram
a figure that branches from a single root
 
undecagon
an eleven-sided polygon
 
barrel
a bulging cylindrical shape; hollow with flat ends
 
paraboloid
a surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis
 
stemma
a tree diagram showing a reconstruction of the transmission of manuscripts of a literary work
 
brachium
(biology) a branching or armlike part of an animal
 
diagonal
(geometry) a straight line connecting any two vertices of a polygon that are not adjacent
 
frown line
a facial wrinkle associated with frowning
 
pocket
(bowling) the space between the headpin and the pins behind it on the right or left
 
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