Nouns denoting two and three dimensional shapes
- heart
- a plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines
- element of a cylinder
- a straight line running the length of the cylinder
- curved shape
- the trace of a point whose direction of motion changes
- AZ
- the azimuth of a celestial body is the angle between the vertical plane containing it and the plane of the meridian
- extrados
- the exterior curve of an arch
- excrescence
- something that bulges out or is protuberant or projects from its surroundings
- cavity
- space that is surrounded by something
- 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
- wart
- any small rounded protuberance (as on certain plants or animals)
- polygonal shape
- a closed plane figure bounded by straight sides
- plane figure
- a two-dimensional shape
- space
- an empty area (usually bounded in some way between things)
- bolus
- a small round soft mass (as of chewed food)
- hollow
- a cavity or space in something
- hemisphere
- half of a sphere
- 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
- pillar
- anything that approximates the shape of a column or tower
- trapezium
- a quadrilateral with no parallel sides
- angle of attack
- the acute angle between the direction of the undisturbed relative wind and the chord of an airfoil
- conoid
- a shape whose base is a circle and whose sides taper up to a point
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