| alpha wave |
the type of brain wave that is a sign of relaxation, having frequencies from eight to thirteen hertz; alpha rhythm. |
| brain wave |
(usu. pl.) rhythmic electric impulses occurring within the brain. [2 definitions] |
| cold wave |
a period of abnormally cold weather. [2 definitions] |
| delta wave |
a low-frequency electric brain wave present during deep sleep in normal adults; delta rhythm. |
| electromagnetic wave |
a wave that contains a magnetic and electric component and that is created by an accelerating electric charge, such as a radio wave, x-ray, or light. |
| ground wave |
a radio wave traveling on or near the earth's surface and affected by its curvature, atmosphere, and the like. |
| heat wave |
a period of unusually hot weather. |
| Hertzian wave |
an electromagnetic wave, such as a radio wave, produced when electricity is oscillated in a conductor. |
| long wave |
a low-frequency electromagnetic wave, usu. a radio wave that is longer than one thousand meters and below three hundred kilohertz in frequency. |
| new wave |
(sometimes cap.) any of various new movements or styles that depart radically from established ones, esp. in the arts or popular culture. |
| permanent wave |
artificial waves that are set into the hair by the application of special chemicals, and that last for usu. two or three months; permanent. |
| radio wave |
an electromagnetic wave with a wavelength of between one millimeter and thirty thousand meters, or a frequency of between ten kilohertz and three hundred thousand megahertz. |
| Rayleigh wave |
a wave on the surface of a solid, such as that caused on the surface of the earth by an earthquake. |
| shock wave |
a compression wave, such as that produced by an explosion; blast. [2 definitions] |
| sine wave |
a smooth, periodic oscillation that is the graphical representation of a sine function. |
| sound wave |
a longitudinal pressure wave in an elastic medium such as air, esp. one that is in an audible range. |
| tidal wave |
an unusual rise or incursion of the sea, caused by an underwater quake, a hurricane, or the like; tsunami. [2 definitions] |
| wave band |
a specific range of radio frequencies, such as those assigned for radio and television transmission. |
| wave guide |
a piece of hollow metal tubing used for the conduction or directional transmission of microwaves. |
| wave-form |
a mathematical representation of the form of a wave, usu. plotted as a graph. |