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loop
anything with a round or oval shape (formed by a curve that is closed and does not intersect itself)
loop: anything with a round or oval shape (formed by a curve that is closed and does not intersect itself)
bight
a loop in a rope
bight: a loop in a rope
coil
a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
coil: a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
spiral
a plane curve traced by a point circling about the center but at increasing distances from the center
spiral: a plane curve traced by a point circling about the center but at increasing distances from the center
helix
a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
helix: a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
double_helix
a pair of parallel helices intertwined about a common axis
double_helix: a pair of parallel helices intertwined about a common axis
perversion
a curve that reverses the direction of something
perversion: a curve that reverses the direction of something
eccentricity
(geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis
eccentricity: (geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis
element
a straight line that generates a cylinder or cone
element: a straight line that generates a cylinder or cone
element_of_a_cone
a straight line joining the apex and a point on the base
element_of_a_cone: a straight line joining the apex and a point on the base
element_of_a_cylinder
a straight line running the length of the cylinder
element_of_a_cylinder: a straight line running the length of the cylinder
helix_angle
the constant angle at which a helix cuts the elements of a cylinder or cone
helix_angle: the constant angle at which a helix cuts the elements of a cylinder or cone
kink
a sharp bend in a line produced when a line having a loop is pulled tight
kink: a sharp bend in a line produced when a line having a loop is pulled tight
whirl
the shape of something rotating rapidly
whirl: the shape of something rotating rapidly
ellipse
a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
ellipse: a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
square
(geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon
square: (geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon
square
something approximating the shape of a square
square: something approximating the shape of a square
quadrate
a square-shaped object
quadrate: a square-shaped object
quadrilateral
a four-sided polygon
quadrilateral: a four-sided polygon
triangle
a three-sided polygon
triangle: a three-sided polygon
triangle
something approximating the shape of a triangle
triangle: something approximating the shape of a triangle
acute_triangle
a triangle whose interior angles are all acute
acute_triangle: a triangle whose interior angles are all acute
equilateral_triangle
a three-sided regular polygon
equilateral_triangle: a three-sided regular polygon
delta
an object shaped like an equilateral triangle
delta: an object shaped like an equilateral triangle
isosceles_triangle
a triangle with two equal sides
isosceles_triangle: a triangle with two equal sides
oblique_triangle
a triangle that contains no right angle
oblique_triangle: a triangle that contains no right angle
obtuse_triangle
a triangle that contains an obtuse interior angle
obtuse_triangle: a triangle that contains an obtuse interior angle
right_triangle
a triangle with one right angle
right_triangle: a triangle with one right angle
scalene_triangle
a triangle with no two sides of equal length
scalene_triangle: a triangle with no two sides of equal length
hexagram
a regular polygon formed by extending each of the sides of a regular hexagon to form two equilateral triangles
hexagram: a regular polygon formed by extending each of the sides of a regular hexagon to form two equilateral triangles
parallel
(mathematics) one of a set of parallel geometric figures (parallel lines or planes)
parallel: (mathematics) one of a set of parallel geometric figures (parallel lines or planes)
parallelogram
a quadrilateral whose opposite sides are both parallel and equal in length
parallelogram: a quadrilateral whose opposite sides are both parallel and equal in length
trapezium
a quadrilateral with no parallel sides
trapezium: a quadrilateral with no parallel sides
trapezoid
a quadrilateral with two parallel sides
trapezoid: a quadrilateral with two parallel sides
star
a plane figure with 5 or more points; often used as an emblem
star: a plane figure with 5 or more points; often used as an emblem
asterism
(mineralogy) a star-shaped figure with six rays that is seen in some crystal structures under reflected or transmitted light
asterism: (mineralogy) a star-shaped figure with six rays that is seen in some crystal structures under reflected or transmitted light
pentacle
a star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon
pentacle: a star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon
pentagon
a five-sided polygon
pentagon: a five-sided polygon
hexagon
a six-sided polygon
hexagon: a six-sided polygon
regular_hexagon
a hexagon with six sides of equal length
regular_hexagon: a hexagon with six sides of equal length
heptagon
a seven-sided polygon
heptagon: a seven-sided polygon
octagon
an eight-sided polygon
octagon: an eight-sided polygon
nonagon
a nine-sided polygon
nonagon: a nine-sided polygon
decagon
a polygon with 10 sides and 10 angles
decagon: a polygon with 10 sides and 10 angles
undecagon
an eleven-sided polygon
undecagon: an eleven-sided polygon
dodecagon
a twelve-sided polygon
dodecagon: a twelve-sided polygon
rhombus
a parallelogram with four equal sides; an oblique-angled equilateral parallelogram
rhombus: a parallelogram with four equal sides; an oblique-angled equilateral parallelogram
rhomboid
a parallelogram with adjacent sides of unequal lengths; an oblique-angled parallelogram with only the opposite sides equal
rhomboid: a parallelogram with adjacent sides of unequal lengths; an oblique-angled parallelogram with only the opposite sides equal
rectangle
a parallelogram with four right angles
rectangle: a parallelogram with four right angles
box
a rectangular drawing
box: a rectangular drawing
spherical_polygon
a figure on the surface of a sphere bounded by arcs of 3 or more great circles
spherical_polygon: a figure on the surface of a sphere bounded by arcs of 3 or more great circles
spherical_triangle
a spherical polygon formed by the arcs of 3 great circles
spherical_triangle: a spherical polygon formed by the arcs of 3 great circles
polyhedron
a solid figure bounded by plane polygons or faces
polyhedron: a solid figure bounded by plane polygons or faces
convex_polyhedron
a polyhedron any plane section of which is a convex polygon
convex_polyhedron: a polyhedron any plane section of which is a convex polygon
concave_polyhedron
a polyhedron some of whose plane sections are concave polygons
concave_polyhedron: a polyhedron some of whose plane sections are concave polygons
prism
a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms
prism: a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms
parallelepiped
a prism whose bases are parallelograms
parallelepiped: a prism whose bases are parallelograms
cuboid
a rectangular parallelepiped
cuboid: a rectangular parallelepiped
quadrangular_prism
a prism whose bases are quadrangles
quadrangular_prism: a prism whose bases are quadrangles
triangular_prism
a prism whose bases are triangles
triangular_prism: a prism whose bases are triangles
sinuosity
having curves
sinuosity: having curves
tortuosity
a tortuous and twisted shape or position
tortuosity: a tortuous and twisted shape or position
warp
a shape distorted by twisting or folding
warp: a shape distorted by twisting or folding
knot
something twisted and tight and swollen
knot: something twisted and tight and swollen
arch
a curved shape in the vertical plane that spans an opening
arch: a curved shape in the vertical plane that spans an opening
bell
the shape of a bell
bell: the shape of a bell
parabola
a plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve
parabola: a plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve
hyperbola
an open curve formed by a plane that cuts the base of a right circular cone
hyperbola: an open curve formed by a plane that cuts the base of a right circular cone
furcation
the place where something divides into branches
furcation: the place where something divides into branches
bifurcation
the place where something divides into two branches
bifurcation: the place where something divides into two branches
bifurcation
a bifurcating branch (one or both of them)
bifurcation: a bifurcating branch (one or both of them)
jog
a sharp change in direction
jog: a sharp change in direction
zigzag
an angular shape characterized by sharp turns in alternating directions
zigzag: an angular shape characterized by sharp turns in alternating directions
angle
the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians
angle: the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians
complementary_angles
two angles whose sum is a right angle
complementary_angles: two angles whose sum is a right angle
angular_distance
the angular separation between two objects as perceived by an observer
angular_distance: the angular separation between two objects as perceived by an observer
hour_angle
(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
hour_angle: (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
true_anomaly
the angular distance of a point in an orbit past the point of periapsis measured in degrees
true_anomaly: the angular distance of a point in an orbit past the point of periapsis measured in degrees
plane_angle
an angle formed by two straight lines (in the same plane)
plane_angle: an angle formed by two straight lines (in the same plane)
spherical_angle
an angle formed at the intersection of the arcs of two great circles
spherical_angle: an angle formed at the intersection of the arcs of two great circles
solid_angle
an angle formed by three or more planes intersecting at a common point (the vertex)
solid_angle: an angle formed by three or more planes intersecting at a common point (the vertex)
inclination
(geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis)
inclination: (geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis)
inclination
(astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees
inclination: (astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees
reentrant_angle
an interior angle of a polygon that is greater than 180 degrees
reentrant_angle: an interior angle of a polygon that is greater than 180 degrees
salient_angle
an angle pointing outward; an interior angle of a polygon that is less than 180 degrees
salient_angle: an angle pointing outward; an interior angle of a polygon that is less than 180 degrees
interior_angle
the angle inside two adjacent sides of a polygon
interior_angle: the angle inside two adjacent sides of a polygon
exterior_angle
the supplement of an interior angle of a polygon
exterior_angle: the supplement of an interior angle of a polygon
hip
(architecture) the exterior angle formed by the junction of a sloping side and a sloping end of a roof
hip: (architecture) the exterior angle formed by the junction of a sloping side and a sloping end of a roof
angle_of_incidence
the angle that a line makes with a line perpendicular to the surface at the point of incidence
angle_of_incidence: the angle that a line makes with a line perpendicular to the surface at the point of incidence
angle_of_attack
the acute angle between the direction of the undisturbed relative wind and the chord of an airfoil
angle_of_attack: the acute angle between the direction of the undisturbed relative wind and the chord of an airfoil
critical_angle
the smallest angle of incidence for which light is totally reflected
critical_angle: the smallest angle of incidence for which light is totally reflected
angle_of_reflection
the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence
angle_of_reflection: the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence
angle_of_refraction
the angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction
angle_of_refraction: the angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction
angle_of_extinction
the angle from its axis that a crystal must be rotated before appearing maximally dark when viewed in polarized light
angle_of_extinction: the angle from its axis that a crystal must be rotated before appearing maximally dark when viewed in polarized light
acute_angle
an angle less than 90 degrees but more than 0 degrees
acute_angle: an angle less than 90 degrees but more than 0 degrees
obtuse_angle
an angle between 90 and 180 degrees
obtuse_angle: an angle between 90 and 180 degrees
dogleg
angle that resembles the hind leg of a dog
dogleg: angle that resembles the hind leg of a dog
right_angle
the 90 degree angle between two perpendicular lines
right_angle: the 90 degree angle between two perpendicular lines
oblique_angle
an angle that is not a right angle or a multiple of a right angle
oblique_angle: an angle that is not a right angle or a multiple of a right angle
reflex_angle
an angle greater than 180 degrees (but less than 360)
reflex_angle: an angle greater than 180 degrees (but less than 360)