from
The Collaborative International Dictionary of English v.0.48
Electro-magnetism \E*lec`tro-mag"net*ism\ n.
1. magnetism produced by an electric current.
[WordNet 1.5]
2. one of the fundamental forces of nature, responsible for
both electrical and magnetic phenomena. Called also the
{electromagnetic force}. Formerly believed to be separate
phenomena, electricity and magnetism were shown by
experiment and theory to be different aspects of the
{electromagnetic force}. It is responsible for the forces
generated between magnetically or electrically charged
objects, and is the fundamental force responsible for the
characteristics of electromagnetic radiation, including
light.
[PJC]
3. the branch of physics concerned with electromagnetic
phenomena.
[WordNet 1.5]