| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Electromagnetic waves | Energy | Radiation that consists of traveling waves of electric and magnetic disturbances. X-rays, light rays and radio waves are among the many kinds of electromagnetic waves. (references) | |
| Electromagnetic waves | Physics | (radiation) - Another term for light. Light waves are fluctuations of electric and magnetic fields in space. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
