sphere
球面
3-sphere
Affine sphere
Alexander horned sphere
Celestial spheres
Curvature
Directional statistics
Dyson sphere
Gauss map
Hand with Reflecting Sphere, M.C. Escher self-portrait drawing illustrating reflection and the optical properties of a mirror sphere
Hoberman sphere
Homology sphere
Homotopy groups of spheres
Homotopy sphere
Lenart Sphere
Napkin ring problem
Orb (optics)
Pseudosphere
Riemann sphere
Solid angle
Sphere packing
Spherical coordinates
Spherical cow
Spherical helix, tangent indicatrix of a curve of constant precession
Spherical polyhedron
Sphericity
Tennis ball theorem
Zoll sphere
/suto3/google.iconsphere
image sphere
define sphere
wikipedia sphere
weblio sphere
kotobank sphere
jisho sphere