'magnetosphere' definitions:
Definition of 'magnetosphere'
(from WordNet)
noun
The magnetic field of a planet; the volume around the planet in which charged particles are subject more to the planet's magnetic field than to the solar magnetic field
Definition of 'magnetosphere'
From: GCIDE
- magnetosphere \mag*net"o*sphere\, n. the magnetic field of a planet; the volume around the planet in which charged particles are subject more to the planet's magnetic field than to the solar magnetic field. [WordNet 1.6]