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Noun Tree | Nouns Groups | Verb Groups | Searchnoun.shape
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- solid
a three-dimensional shape - plane, sheet
(mathematics) an unbounded two-dimensional shape - 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) - midplane, midline
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 - tangent plane
the plane that contains all the lines tangent to a specific point on a surface - natural shape
a shape created by natural forces - leaf shape, leaf form
any of the various shape that leaves of plants can assume - equilateral
a figure whose sides are all equal - flare, flair
a shape that spreads outward - figure
a combination of points and lines and planes that form a visible palpable shape - pencil
a figure formed by a set of straight lines or light rays meeting at a point - plane figure, two-dimensional figure
a two-dimensional shape - solid figure, three-dimensional figure
a three-dimensional shape - subfigure
a figure that is a part of another figure - line
a length (straight or curved) without breadth or thickness - bulb
anything with a round shape resembling a teardrop - convexity, convex shape
a shape that curves or bulges outward - camber
a slight convexity (as of the surface of a road) - entasis
a slight convexity in the shaft of a column - angularity, angular shape
a shape having one or more sharp angles - incurvation, concavity, concave shape, incurvature
a shape that curves or bends inward - cylinder
a solid bounded by a cylindrical surface and two parallel planes (the bases) - round shape
a shape that is curved and without sharp angles - conglomeration, conglobation
a rounded spherical form - heart
a plane figure with rounded sides curving inward at the top and intersecting at the bottom - polygon, polygonal shape
a closed plane figure bounded by straight sides - isogon
an equiangular polygon - convex polygon
a polygon such that no side extended cuts any other side or vertex - concave polygon
a polygon such that there is a straight line that cuts it in four or more points - reentrant polygon, reentering polygon
a polygon with one or more reentrant angles - regular polygon
a polygon with all sides and all angles equal - distortion, distorted shape
a shape resulting from distortion - amorphous shape
an ill-defined or arbitrary shape - curve, curved shape
the trace of a point whose direction of motion changes - closed curve
a curve (such as a circle) having no endpoints - simple closed curve, Jordan curve
a closed curve that does not intersect itself - S-shape
a double curve resembling the letter S - catenary
the curve theoretically assumed by a perfectly flexible and inextensible cord of uniform density and cross section hanging freely from two fixed points - Cupid's bow
the double curve of the upper lip when considered to resemble Cupid's bow - wave, undulation
an undulating curve - extrados
the exterior curve of an arch - gooseneck
something in a thin curved form (like the neck of a goose) - intrados
the interior curve of an arch - twist, turn, bend, crook
a circular segment of a curve - hook, crotchet
a sharp curve or crook - uncus
(biology) any hook-shaped process or part - envelope
a curve that is tangent to each of a family of curves - bight
a bend or curve (especially in a coastline) - straight line
a line traced by a point traveling in a constant direction - 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) - perpendicular
a straight line at right angles to another line - connection, connexion, link
a connecting shape - asymptote
a straight line that is the limiting value of a curve - tangent
a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point - secant
a straight line that intersects a curve at two or more points - perimeter
a line enclosing a plane areas - radius
a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere) - 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) - centerline, center line
a line that bisects a plane figure - dome
a concave shape whose distinguishing characteristic is that the concavity faces downward - fossa, pit
a concavity in a surface (especially an anatomical depression) - recession, recess, corner, niche
a small concavity - cone, conoid, cone shape
a shape whose base is a circle and whose sides taper up to a point - funnel, funnel shape
a conical shape with a wider and a narrower opening at the two ends - conic section, conic
(geometry) a curve generated by the intersection of a plane and a circular cone - intersection
a point or set of points common to two or more geometric configurations - oblong
a plane figure that deviates from a square or circle due to elongation - circle
ellipse in which the two axes are of equal length - circlet
a small circle - circle
something approximating the shape of a circle - equator
a circle dividing a sphere or other surface into two usually equal and symmetrical parts - semicircle, hemicycle
a plane figure with the shape of half a circle - arc
a continuous portion of a circle - scallop, crenel, crenelle, crenation, crenature
one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.) - chord
a straight line connecting two points on a curve - sector
a plane figure bounded by two radii and the included arc of a circle - saucer, disk, disc
something with a round shape resembling a flat circular plate - ring, halo, doughnut, annulus, anchor ring
a toroidal shape - 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 - roll, ringlet, coil, whorl, curl, scroll, curlicue, gyre
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, 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 - perversion
a curve that reverses the direction of something - eccentricity
(geometry) a ratio describing the shape of a conic section - 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 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 - twist, twirl, kink
a sharp bend in a line produced when a line having a loop is pulled tight - whirl, convolution, vortex, swirl
the shape of something rotating rapidly - ellipse, oval
a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it - square, foursquare
(geometry) a plane rectangle with four equal sides and four right angles - square
something approximating the shape of a square - quadrate
a square-shaped object - quadrangle, quadrilateral, tetragon
a four-sided polygon - triangle, trigon, trilateral
a three-sided polygon - triangle
something approximating the shape of a triangle - acute triangle, acute-angled triangle
a triangle whose interior angles are all acute - equilateral triangle, equiangular triangle
a three-sided regular polygon - delta
an object shaped like an equilateral triangle - isosceles triangle
a triangle with two equal sides - oblique triangle
a triangle that contains no right angle - obtuse triangle, obtuse-angled triangle
a triangle that contains an obtuse interior angle - right triangle, right-angled triangle
a triangle with one right angle - 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 - 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 - trapezium
a quadrilateral with no parallel sides - trapezoid
a quadrilateral with two parallel sides - star
a plane figure with 5 or more points - asterism
(mineralogy) a star-shaped figure with six rays that is seen in some crystal structures under reflected or transmitted light - pentacle, pentagram, pentangle
a star with 5 points - pentagon
a five-sided polygon - hexagon
a six-sided polygon - regular hexagon
a hexagon with six sides of equal length - heptagon
a seven-sided polygon - octagon
an eight-sided polygon - nonagon
a nine-sided polygon - decagon
a polygon with 10 sides and 10 angles - undecagon
an eleven-sided polygon - dodecagon
a twelve-sided polygon - diamond, rhombus, rhomb
a parallelogram with four equal sides - rhomboid
a parallelogram with adjacent sides of unequal lengths - rectangle
a parallelogram with four right angles - box
a rectangular drawing - 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 - polyhedron
a solid figure bounded by plane polygons or faces - 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 - prism
a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms - parallelepiped, parallelopiped, parallelepipedon, parallelopipedon
a prism whose bases are parallelograms - cuboid
a rectangular parallelepiped - quadrangular prism
a prism whose bases are quadrangles - triangular prism
a prism whose bases are triangles - sinuosity, sinuousness
having curves - contortion, tortuousness, crookedness, torsion, tortuosity
a tortuous and twisted shape or position - buckle, warp
a shape distorted by twisting or folding - knot, gnarl
something twisted and tight and swollen - arch
a curved shape in the vertical plane that spans an opening - bell, bell shape, campana
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 - hyperbola
an open curve formed by a plane that cuts the base of a right circular cone - forking, furcation
the place where something divides into branches - bifurcation
the place where something divides into two branches - bifurcation
a bifurcating branch (one or both of them) - jog
a sharp change in direction - zigzag, zig, zag
an angular shape characterized by sharp turns in alternating directions - angle
the space between two lines or planes that intersect - complementary angles
two angles whose sum is a right angle - angular distance
the angular separation between two objects as perceived by an observer - hour angle, HA
(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing - 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) - 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) - inclination, angle of inclination
(geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis) - inclination, inclination of an orbit
(astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees - reentrant angle, reentering angle
an interior angle of a polygon that is greater than 180 degrees - salient angle
an angle pointing outward - interior angle, internal angle
the angle inside two adjacent sides of a polygon - exterior angle, external 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 - angle of incidence, incidence angle
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 - 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 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, extinction angle
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 - obtuse angle
an angle between 90 and 180 degrees - dogleg
angle that resembles the hind leg of a dog - 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 - reflex angle
an angle greater than 180 degrees (but less than 360) - perigon, round angle
an angle of 360 degrees - cutting angle
the angle between the face of a cutting tool and the surface of the work - inclination, dip, angle of dip, magnetic dip, magnetic inclination
(physics) the angle that a magnetic needle makes with the plane of the horizon - 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) - variation, magnetic declination, magnetic variation
the angle (at a particular location) between magnetic north and true north - AZ, azimuth
the azimuth of a celestial body is the angle between the vertical plane containing it and the plane of the meridian - bowl, trough
a concave shape with an open top - groove, channel
a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record) - rut
a groove or furrow (especially one in soft earth caused by wheels) - pocket, scoop
a hollow concave shape made by removing something - extrusion, protrusion, jut, prominence, excrescence, bump, swelling, bulge, hump, gibbosity, gibbousness, protuberance
something that bulges out or is protuberant or projects from its surroundings - belly
a part that bulges deeply - caput
a headlike protuberance on an organ or structure - mogul
a bump on a ski slope - nub, nubble
a small lump or protuberance - snag
a sharp protuberance - wart
any small rounded protuberance (as on certain plants or animals) - thickening, knob, node
any thickened enlargement - bow, arc
something curved in shape