Exotic

Exotic may refer to:

==Mathematics and physics== Exotic R4, a differentiable 4-manifold, homeomorphic but not diffeomorphic to the Euclidean space R4 Exotic sphere, a differentiable n-manifold, homeomorphic but not diffeomorphic to the ordinary n-sphere Exotic atom, an atom with one or more electrons replaced by other negatively charged particles Exotic hadron Exotic baryon, bound states of 3 quarks and additional particles Exotic meson, non-quark model mesons Exotic matter, a hypothetical concept of particle physics