(engineering) Electromagnetic waves with frequencies around one terahertz. / (engineering) Especially electromagnetic waves in the range 0.1-30 THz (or subranges there of, see T-rays or T-waves).

ionizing radiation that is naturally present in the environment.

(medicine, pathology) Any illness produced by ionizing radiation with symptoms ranging from nausea to death.

Synonym of radiation sickness

a device that measures the intensity of radiation from, and thus the temperature of, a hot body

(biology) The diversification of species into separate forms that each adapt to occupy a specific environmental niche.

(physics) electromagnetic radiation that has a frequency of about 3 to 30 GHz

Radiation (quantized as photons) consisting of oscillating electric and magnetic fields oriented perpendicularly to each other, moving through space.

High-energy radiation that is capable of causing ionization in substances through which it passes; also includes high-energy particles.

(physics) The electromagnetic radiation emitted by the acceleration of relativistic charged particles in a synchrotron or under natural conditions approximating those of a synchrotron.