Nouns denoting two and three dimensional shapes
- nubble
- a small lump or protuberance
- quadric surface
- a curve or surface whose equation (in Cartesian coordinates) is of the second degree
- intersection
- a point or set of points common to two or more geometric configurations
- vector
- a straight line segment whose length is magnitude and whose orientation in space is direction
- obtuse triangle
- a triangle that contains an obtuse interior angle
- sphere
- a solid figure bounded by a spherical surface (including the space it encloses)
- prism
- a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms
- cleft
- a split or indentation in something (as the palate or chin)
- hook
- a sharp curve or crook; a shape resembling a hook
- sac
- an enclosed space
- margin
- the boundary line or the area immediately inside the boundary
- dip
- (physics) the angle that a magnetic needle makes with the plane of the horizon
- complex plane
- a geometric representation of the complex numbers established by the real axis and the orthogonal imaginary axis; it can be thought of as a modified Cartesian plane, with the real part of a complex number represented by a displacement along the x-axis, and the imaginary part by a displacement along the y-axis
- parabola
- a plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve
- undulation
- an undulating curve
- dogleg
- angle that resembles the hind leg of a dog
- trapezohedron
- a polyhedron whose faces are trapeziums
- diameter
- a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)
- angular distance
- the angular separation between two objects as perceived by an observer
- cylinder
- a surface generated by rotating a parallel line around a fixed line
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