Exotic

• In mathematics:
• Exotic R⁴ - differentiable manifold homeomorphic but not diffeomorphic to the Euclidean space R⁴
• Exotic sphere - differentiable manifold homeomorphic but not diffeomorphic to the ordinary sphere

• In physics:
• Exotic atom atom with one or more electrons replaced by other negatively charged particles
• Exotic hadrons:
• Exotic baryons - bound states of 3 quarks and additional particles
• Exotic mesons - non-quark model mesons
• Exotic matter - a hypothetical concept of particle physics

• In other fields:
• Exotic pet - non common pet
• Exotic cat - a breed of cat
• Exotic dancer - a type of dancer or stripper
• Exotic derivatives - a type of financial derivatives
• Exotic species - species not native to an area

See also

• Exotica (disambiguation)
• Exoticism