Nouns denoting two and three dimensional shapes
- hemisphere
- half of a sphere
- conic
- (geometry) a curve generated by the intersection of a plane and a circular cone
- loop
- anything with a round or oval shape (formed by a curve that is closed and does not intersect itself)
- sack
- an enclosed space
- exterior angle
- the supplement of an interior angle of a polygon
- lead
- the angle between the direction a gun is aimed and the position of a moving target (correcting for the flight time of the missile)
- teardrop
- anything shaped like a falling drop (as a pendant gem on an earring)
- toroid
- the doughnut-shaped object enclosed by a torus
- arc
- a continuous portion of a circle
- intersection
- a point or set of points common to two or more geometric configurations
- 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)
- rut
- a groove or furrow (especially one in soft earth caused by wheels)
- equilateral
- a figure whose sides are all equal
- ovoid
- an egg-shaped object
- round shape
- a shape that is curved and without sharp angles
- heart
- a plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines
- plane angle
- an angle formed by two straight lines (in the same plane)
- rim
- the shape of a raised edge of a more or less circular object
- thalweg
- the middle of the chief navigable channel of a waterway that forms the boundary line between states
- 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)
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