noun. The physics of electricity and magnetism.

noun. An interaction between electricity and magnetism, as when an electric current or a changing electric field generates a magnetic field, or when a changing magnetic field generates an electric field.

noun. A unified fundamental force that combines the aspects of electricity and magnetism and is one of the four fundamental forces. (technically it can be unified with weak nuclear to form electroweak) Its gauge boson is the photon.

noun. Electricity and magnetism, collectively, as a field of study.

"The majority also relies on O'Reilly v. Morse, citing the Court's rejection of Morse's Claim 8 for "the use of the motive power of the electro or galvanic current, which I call electromagnetism, however developed, for making or printing intelligible characters, signs or letters at any distances ....""

ferromagnetism  magnetism  

diamagnetism  electromagnetics  ferromagnetism  gilbert  hysteresis