Definition of Radiation

1. Noun. Energy that is radiated or transmitted in the form of rays or waves or particles.

2. Noun. The act of spreading outward from a central source.
Specialized synonyms: Bombardment
Generic synonyms: Emanation, Emission
Derivative terms: Radiate

3. Noun. Syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours. "He was suffering from radiation"
Exact synonyms: Radiation Sickness, Radiation Syndrome
Generic synonyms: Syndrome

4. Noun. The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay.
Exact synonyms: Radioactivity
Specialized synonyms: Corpuscular Radiation, Particulate Radiation
Generic synonyms: Emission
Derivative terms: Radioactive

5. Noun. The spread of a group of organisms into new habitats.
Specialized synonyms: Adaptive Radiation
Generic synonyms: Spread, Spreading, Action, Activity, Natural Action, Natural Process
Derivative terms: Radiate

6. Noun. A radial arrangement of nerve fibers connecting different parts of the brain.
Generic synonyms: Neural Structure
Derivative terms: Radiate

7. Noun. (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance.
Exact synonyms: Actinotherapy, Irradiation, Radiation Therapy, Radiotherapy
Generic synonyms: Therapy
Specialized synonyms: Phototherapy, Curietherapy, Radium Therapy, X-ray Therapy
Category relationships: Medical Specialty, Medicine
Derivative terms: Radiotherapist

Definition of Radiation

1. n. The act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness.

Definition of Radiation

1. Noun. The shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat. ¹

2. Noun. The process of radiating waves or particles. ¹

3. Noun. The transfer of energy via radiation (as opposed to convection or conduction) ¹

4. Noun. Radioactive energy ¹

¹ Source:

Definition of Radiation

1. [n -S]

Medical Definition of Radiation

1. Propagation of energy through space. In the context of this report, it is electromagnetic radiation (X-rays or gamma rays) or corpuscular radiation (alpha particles, electrons, protons, neutrons) capable of producing ionisation. (16 Dec 1997)

Radiation Pictures

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Lexicographical Neighbors of Radiation

radiate ligament
radiate ligament of head of rib
radiate ligament of wrist
radiate sternocostal ligaments
radiatio acustica
radiatio corporis callosi
radiatio optica
radiatio pyramidalis
radiation (current term)
radiation-protective agents
radiation-sensitizing agents
radiation anaemia
radiation biology
radiation biophysics
radiation burn
radiation caries
radiation cataract
radiation chemistry
radiation chimera
radiation damage
radiation dermatosis
radiation diagram
radiation dose

Literary usage of Radiation

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Textbook of Physics by John Henry Poynting, Joseph John Thomson (1906)
"THERMODYNAMICS OF radiation. General Principle—The Pressure of radiation—The Normal Stream of radiation, the Total Stream ..."

2. Nuclear Legislation: Analytical Study : Regulatory and Institutional by OECD Nuclear Energy Agency (2000)
"radiation Protection On 1 July 1988, a radiation Protection Act came into force, replacing the previous Act of the same name which dated from 1958. ..."

3. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, Literature and (1910)
"The form of this function may be determined experimentally by observing the radiation between two black bodies at different temperatures, which will be ..."

4. A Text-book of Physics: Heat by John Henry Poynting, Joseph John Thomson (1906)
"-The thermodynamic theory of radiation starts with the idea that a space containing radiation resembles the working substance in a heat.engine, ..."

5. Readers' Guide to Periodical Literature by Anna Lorraine Guthrie, Marion A. Knight, H.W. Wilson Company, Estella E. Painter (1920)
"Monist 26:200-31 on radiation, and on the possible structure of atoms. OJ Lodge. Nature 104:15-19, 82-7 S 4, 25 '19 Astronomical atom and the spectral ..."

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