An electrically neutral quasiparticle consisting of an electron and an associated hole (hole, n. 4f) held together by electrostatic attraction…

A quantum or quasiparticle associated with vortical motion in a liquid, esp. liquid helium.

A quasiparticle in a crystal consisting of a free electron together with an associated distortion of the crystal lattice, the distortion resulting…

Physics. The quantum or quasiparticle associated with a collective oscillation of charge density in an electrical conductor or a plasma.

A quasiparticle in an ionic crystal consisting of a photon strongly coupled to a quasiparticle such as a phonon or an exciton.

A solitary wave (see solitary, adj. 1e); a quantum or quasiparticle propagated in the manner of a solitary wave.