Nouns denoting two and three dimensional shapes

quadrangular prism
a prism whose bases are quadrangles
 
tilt angle
the angle a rocket makes with the vertical as it curves along its trajectory
 
heart
a plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines
 
helix angle
the constant angle at which a helix cuts the elements of a cylinder or cone
 
salient angle
an angle pointing outward; an interior angle of a polygon that is less than 180 degrees
 
dermatoglyphic
the lines that form patterns on the skin (especially on the fingertips and the palms of the hands and the soles of the feet)
 
circlet
a small circle
 
sector
a plane figure bounded by two radii and the included arc of a circle
 
concave polygon
a polygon such that there is a straight line that cuts it in four or more points
 
trapezoid
a quadrilateral with two parallel sides
 
heptagon
a seven-sided polygon
 
element of a cylinder
a straight line running the length of the cylinder
 
ovoid
an egg-shaped object
 
bead
a shape that is spherical and small
 
camber
a slight convexity (as of the surface of a road)
 
rhombohedron
a parallelepiped bounded by six similar faces (either rhombuses or parallelograms)
 
inclination
(geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis)
 
geodesic
(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)
 
hypocycloid
a line generated by a point on a circle that rolls around inside another circle
 
hexahedron
any polyhedron having six plane faces
 
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