types:
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solid
a threedimensional shape

plane, sheet
(mathematics) an unbounded twodimensional shape

natural shape
a shape created by natural forces; not manmade

flair, flare
a shape that spreads outward

figure
a combination of points and lines and planes that form a visible palpable shape

line
a length (straight or curved) without breadth or thickness; the trace of a moving point

angular shape, angularity
a shape having one or more sharp angles

round shape
a shape that is curved and without sharp angles

distorted shape, distortion
a shape resulting from distortion

amorphous shape
an illdefined or arbitrary shape

connection, connexion, link
a connecting shape

circle
something approximating the shape of a circle

square
something approximating the shape of a square

triangle
something approximating the shape of a triangle

column, pillar, tower
anything that approximates the shape of a column or tower

plume
anything that resembles a feather in shape or lightness

curve
a line on a graph representing data

Cartesian plane
a plane in which all points can be described in Cartesian coordinates

facet plane
the plane of a facet of an object (as of a cube)

midline, midplane
the median plane of the body (or some part of the body)

orbital plane
(astronomy) the plane on which a body is orbiting

picture plane
the plane that is in the foreground of a drawing or painting; coextensive with but different from the objective surface of the work

tangent plane
the plane that contains all the lines tangent to a specific point on a surface

leaf form, leaf shape
any of the various shape that leaves of plants can assume

equilateral
a figure whose sides are all equal

pencil
a figure formed by a set of straight lines or light rays meeting at a point

plane figure, twodimensional figure
a twodimensional shape

solid figure, threedimensional figure
a threedimensional shape

subfigure
a figure that is a part of another figure

bulb
anything with a round shape resembling a teardrop

convex shape, convexity
a shape that curves or bulges outward

concave shape, concavity, incurvation, incurvature
a shape that curves or bends inward

cylinder
a solid bounded by a cylindrical surface and two parallel planes (the bases)

curve, curved shape
the trace of a point whose direction of motion changes

straight line
a line traced by a point traveling in a constant direction; a line of zero curvature

geodesic, 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)

perimeter
a line enclosing a plane area

center line, centerline
a line that bisects a plane figure

cone, cone shape, conoid
a shape whose base is a circle and whose sides taper up to a point

disc, disk, saucer
something with a round shape resembling a flat circular plate

coil, curl, curlicue, gyre, ringlet, roll, scroll, whorl
a round shape formed by a series of concentric circles (as formed by leaves or flower petals)

convolution, swirl, vortex, whirl
the shape of something rotating rapidly

parallel
(mathematics) one of a set of parallel geometric figures (parallel lines or planes)

polyhedron
a solid figure bounded by plane polygons or faces

contortion, crookedness, torsion, tortuosity, tortuousness
a tortuous and twisted shape or position

buckle, warp
a shape distorted by twisting or folding

gnarl, knot
something twisted and tight and swollen

forking, furcation
the place where something divides into branches

jog
a sharp change in direction

zag, zig, zigzag
an angular shape characterized by sharp turns in alternating directions

ellipsoid of revolution, spheroid
a shape that is generated by rotating an ellipse around one of its axes

sphere
a threedimensional closed surface such that every point on the surface is equidistant from the center

sphere
a solid figure bounded by a spherical surface (including the space it encloses)

cylinder
a surface generated by rotating a parallel line around a fixed line

toroid, torus
a ringshaped surface generated by rotating a circle around an axis that does not intersect the circle

toroid
the doughnutshaped object enclosed by a torus

columella
a small column (or structure resembling a column) that is a part of a plant or animal

hoodoo
(geology) a column of weathered and unusually shaped rock

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

bound, boundary, edge
a line determining the limits of an area

bend, crease, crimp, flexure, fold, plication
an angular or rounded shape made by folding

shapelessness
an amorphous or indefinite shape

blob
an indistinct shapeless form

space
an empty area (usually bounded in some way between things)

node
a connecting point at which several lines come together

articulation, join, joint, junction, juncture
the shape or manner in which things come together and a connection is made

cast, mold, mould, stamp
the distinctive form in which a thing is made

block, cube
a threedimensional shape with six square or rectangular sides

ovoid
an eggshaped object

frustum
a truncated cone or pyramid; the part that is left when a cone or pyramid is cut by a plane parallel to the base and the apical part is removed

tendril
something long, light, slender, and often curling

segment
the part of a line between any two points