Nouns denoting two and three dimensional shapes

truncated pyramid

a frustum formed from a pyramid

 

incidence angle

the angle that a line makes with a line perpendicular to the surface at the point of incidence

 

dodecahedron

any polyhedron having twelve plane faces

 

tesseract

the four-dimensional analogue of a cube

 

parallelogram

a quadrilateral whose opposite sides are both parallel and equal in length

 

conformation

a symmetrical arrangement of the parts of a thing

 

conic

(geometry) a curve generated by the intersection of a plane and a circular cone

 

circle

something approximating the shape of a circle

 

sine curve

the curve of y=sin x

 

rhomb

a parallelogram with four equal sides; an oblique-angled equilateral parallelogram

 

dimple

any slight depression in a surface

 

anchor ring

a toroidal shape

 

secant

a straight line that intersects a curve at two or more points

 

snag

a sharp protuberance

 

score

a slight surface cut (especially a notch that is made to keep a tally)

 

crevice

a long narrow depression in a surface

 

tail end

any projection that resembles the tail of an animal

 

spiral

a plane curve traced by a point circling about the center but at increasing distances from the center

 

nonagon

a nine-sided polygon

 

rim

the shape of a raised edge of a more or less circular object