Rydberg molecule

Etymology
Named after the Swedish physicist.

Noun

 * 1)  A molecule, especially one consisting of two atoms of the same element, that has a permanent dipole because one of the atoms is in a very high excited state.

Related terms

 * Rydberg atom
 * Rydberg constant
 * Rydberg formula
 * Rydberg matter
 * Rydberg state