- circle
- oval
- parabola
- conic section
- conic
- hyperbola
- cone
- focus
- plane
- geometry
- rhombus
- rectangle
- convex
- concave
- circumference
- determinant
- curvature
- trapezoid
- diagonals
- radii
- parallelogram
- hexagon
- centroid
- torus
- diameter
- ellipsoid
- orbit
- radius of curvature
- spherical
- affine transformation
- rectangular
- hexagonal
- elliptical
- mathematics
- planar
- eccentricity
- tusi couple
- infinity
- lattice
- orb
- nebula
- orbits
- triangle
- physics
- astronomy
- engineering
- dot product
- cylindrical
- symmetry
- inverted
- optics
- inverse function
- ellipsoids
- parabolic
- matrix
- hyperplane
- quadrilateral
- semicircle
- plane curve
- archimedes
- geodesic
- limiting case
- trapezoidal
- conformal
- spacetime
- flange
- equilateral
- tangent
- striations
- closed curve
- laplacian
- hemispherical
- orthoptic
- airfoil
- hyperbolic
- prism
- symplectic
- elliptic
- ellipses
- pellicle
- prisms
- invertible
- subtended
- automorphisms
- functionals
- concentric
- lattices
- affine
- tangential
- generalisation
- redshift
- ellipsoidal
- curvilinear
- headland
- invariant
- enclosing
- congruence
- axial
- transversal
- geodesics
- open curve
- cross-section
- fissure
- polygon
- chinois
- chirality
- unbounded set
- cross section
- degree
- axis of rotation
- radian
- analytical geometry
- curve
- 1-dimensional
- ellipsograph
- ecliptic
- tetrahedron
- asterism
- hypotenuse
- dodecahedron
- semicircles
- vertices
- hexagram
- polyhedron
- concavity
- gnomon
- auroral
- photosphere
- anisotropy
- isosceles
- oculus
- radians
- photometry
- apse
- starburst
- equinoxes
- spheroid
- sidereal
- interferometer
- oblate
- whorls
- euclidean
- icosahedral
- protrusion
- figure-eight
- u-shape
- horse-shoe
- bijection
- proklos
- y-shaped
- 45-degree
- solar system
- antiprism
- area
- horseshoe-shaped
- barycentric coordinates
- right-angled
- 2-dimensional
- circumcircle
- left-right
- parallel projection
- d-shaped
- perspective projection
- two-dimensional
- crescent-shaped
- semi-circular
- spacings
- tiling
- half-moon
- paraboloid
- one-dimensional
- ring-shaped
- lissajous figure
- infinite-dimensional
- space-time
- residuated
- scale-space
- x-axis
- sine wave
- midocean
- semi-circle
- h-shaped
- elliptical polarization
- grassmannian
- approximations
- apollonius of perga
- locus of points
- dandelin spheres
- semi-major and semi-minor axes
- momental
- arcsecond
- nebulosity
- moonlet
- quasicrystal
- heliopause
- geoid
- osculating circle
- blackbody
- prograde
- toroid
- squiggle
- pentagons
- chromosphere
- retroreflector
- frustum
- earthshine
- quincunx
- pushpin
- capricornus
- synclinal
- coronagraph
- trigonometric function
- perimeter
- de la hire
- eccentric anomaly
- perpendicular
- computer aided design
- vertex
- hesse normal form
- triangle inequality
- whispering gallery
- conjugate diameter
- parametric equation
- rotation
- descriptive geometry
- translation
- rytz's construction
- philippe de la hire
- drawing pin
- charles graves
- reflection
- trammel of archimedes
- mirror
- benjamin bramer
- milky way galaxy
- french curve
- steiner conic
- inscribed angle theorem
- cupola
- isosceles triangle
- equilateral triangle
- triangular prism
- celestial sphere
- zodiacal light
- celestial equator
- syrtis major
- horsehead nebula
- epsilon aurigae
- convex lens
- spiral galaxy
- galactic equator
- eclipsing binary
- oblique angle
- omega centauri
- cumulus cloud
- ellipsoid of revolution
- planetary nebula
- andromeda galaxy
- oort cloud
- cirrus cloud
- dipole moment
- armillary sphere
- cartesian coordinates
- caudal fin
- pole and polar
- utah
- definite integral
- hypotrochoid
- chicago
- complete elliptic integral of the second kind
- quadric
- arithmetic-geometric mean
- alhambra
- infinite series
- double factorial
- srinivasa ramanujan
- arc length
- elliptic integral
- similarity
- locus
- spinning
- spring
- torque
- ovoid
- oscilloscope
- finance
- electronics
- elliptic functions
- statistics
- dimension
- bobbin
- circumscribed circle
- concentric circle
- inscribed figure
- analytic geometry
- cartesian plane
- implicit and explicit functions
- degenerate conic
- rotation of axes
- translation of axes
- canonical form
- barycenter
- direct2d
- quickdraw
- unit circle
- polar coordinates
- true anomaly
- semi-latus rectum
- prolate spheroid
- fluorescent lamp
- image scanner
- whisper chamber
- national statuary hall
- united states capitol
- john quincy adams
- mormon tabernacle
- temple square
- salt lake city
- museum of science and industry
- university of illinois at urbana–champaign
- johannes kepler
- kepler's laws of planetary motion
- isaac newton
- newton's law of universal gravitation
- two-body problem
- graphics primitive
- quantum mechanics
- electromagnetic radiation
- elliptical orbit
- arithmetic mean
- random vector
- elliptical distribution
- harmonic mean
- geometric mean
- angular speed
- non-circular gear
- link chain
- jack bresenham
- composite bézier curve
- bézier curve
- ellipsoid method
- toothed belt
- mechanical advantage
- harmonic oscillator
- multivariate normal distribution
- oblong
- geometrical
- geometric
- angular
- horizontal
- rectangles
- crescent
- elongated
- diagram
- triangles
- curved
- oval shaped
- planets
- diagonal
- contour
- geometries
- conical
- vertically
- indentation
- enceladus
- geometric shapes
- petal
- aperture
- uranus
- arcs
- curving
- constellations
- symmetrical
- horizontally
- diagonally
- comet
- μm
- vertical
- corona
- spacing
- quadrants
- milky way
- octagonal
- outwards
- polygons
- distal
- pixel
- asteroid
- aurora
- petals
- diameters
- cosmic
- linear
- moon
- dots
- undulating
- arrays
- fainter
- spatially
- filaments
- atoms
- moons
- luminosity
- celestial
- sunspots
- reflector
- counterclockwise
- lobes
- astronomers
- crescent moon
- cube
- nanometers
- reflectivity
- optical illusion
- fig.
- galaxy
- numerals
- orbital
- quadrangle
- neutron star
- constellation
- droplet

That's about all the ellipse related words we've got! I hope this list of ellipse terms was useful to you in some way or another. The words down here at the bottom of the list will be in some way associated with ellipse, but perhaps tenuously (if you've currenly got it sorted by relevance, that is). If you have any feedback for the site, please post it here, but please note this is only a hobby project, so I may not be able to make regular updates to the site. Have a nice day! 🐖