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radiation    音标拼音: [r,edi'eʃən]
n. 放射,发射;放射物;散热器;射线疗法

放射,发射;放射物;散热器;射线疗法

radiation
辐射

radiation
n 1: energy that is radiated or transmitted in the form of rays
or waves or particles
2: the act of spreading outward from a central source
3: 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" [synonym: {radiation sickness},
{radiation syndrome}, {radiation}]
4: the spontaneous emission of a stream of particles or
electromagnetic rays in nuclear decay [synonym: {radiation},
{radioactivity}]
5: the spread of a group of organisms into new habitats
6: a radial arrangement of nerve fibers connecting different
parts of the brain
7: (medicine) the treatment of disease (especially cancer) by
exposure to a radioactive substance [synonym: {radiotherapy},
{radiation therapy}, {radiation}, {actinotherapy},
{irradiation}]

Radiation \Ra`di*a"tion\ (r[=a]`d[i^]*[=a]"sh[u^]n), n. [L.
radiatio: cf. F. radiation.]
1. The act of radiating, or the state of being radiated;
emission and diffusion of rays of light; beamy brightness.
[1913 Webster]

2. The shooting forth of anything from a point or surface,
like the diverging rays of light; as, the radiation of
heat.
[1913 Webster]

111 Moby Thesaurus words for "radiation":
X ray, actinic ray, actinism, arc lighting, asteroids, atomic beam,
atomic ray, attenuation, aurora particles, beam, beam of light,
black and white, blackout, broadcast, broadcasting, chiaroscuro,
circumfusion, contrast, cosmic particles, cosmic ray bombardment,
decorative lighting, diffraction, diffusion, dilution,
direct lighting, dispensation, dispersal, dispersion,
dissemination, dissipation, distribution, divergence,
electric lighting, emanation, emission, enlightenment, evaporation,
expansion, festoon lighting, floodlighting, fluorescent lighting,
fragmentation, gamma ray, gaslighting, gleam, glow lighting,
highlight, highlights, illumination, incandescent lighting,
indirect lighting, infrared ray, intergalactic matter,
invisible radiation, irradiance, irradiancy, irradiation, leam,
light, light and shade, light source, lighting, luminous energy,
meteor dust impacts, meteors, overhead lighting, patch, pencil,
peppering, photon, photosensitivity, propagation, publication,
radiance, radiancy, radiant energy, radiorays, radius, ray,
ray of light, ribbon, ribbon of light, scattering, scatterment,
shedding, shotgun pattern, sidelight, solar rays, sowing,
space bullets, spattering, splay, spoke, spot lighting, spread,
spreading, sprinkling, stage lighting, streak, stream,
stream of light, streamer, strewing, strip lighting, the bends,
tonality, ultraviolet ray, violet ray, visible radiation,
volatilization, weightlessness

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  • Radiation - World Health Organization (WHO)
    Radiation is energy that travels in the form of waves or particles and is part of our everyday environment People are exposed to radiation from cosmic rays, as well as to radioactive materials found in the soil, water, food, air and also inside the body
  • Radiation and health
    Radiation is the emission of energy as electromagnetic waves or moving subatomic particles Natural radiation comes from many naturally occurring radioactive materials found in soil, water, air and in the body Every day, people inhale and ingest forms of radiation from air, food and water
  • Radiation and health - World Health Organization (WHO)
    We work to strengthen radiation protection of the public, patients and workers worldwide We provide Member States with evidence-based guidance, tools and technical advice on public health issues related to ionizing and non-ionizing radiation
  • Ionizing radiation and health effects
    WHO fact sheet on ionizing radiation, health effects and protective measures: includes key facts, definition, sources, type of exposure, health effects, nuclear emergencies, WHO response
  • Radiation: Ionizing radiation - World Health Organization (WHO)
    Ionizing radiation is radiation with enough energy that to remove tightly bound electrons from the orbit of an atom, causing that atom to become charged or ionized Here we are concerned with only one type of radiation, ionizing radiation, which occurs in two forms: waves or particles There are several forms of electromagnetic radiation, which differ only in frequency and wavelength: Longer
  • 辐射与健康 - World Health Organization (WHO)
    辐射是以电磁波或运动的亚原子粒子形式发射能量。天然辐射来自土壤、水、空气和体内存在的许多天然放射性物质。人们每天通过空气、食物和水吸入和摄入各种形式的辐射。 辐射暴露可能源自天然（如住房内的氡），由计划（医疗、职业）或意外情况引起。这种暴露也可能是通过外部途径
  • Radiación y salud - World Health Organization (WHO)
    A dosis muy elevadas, la radiación puede alterar el funcionamiento de los tejidos y los órganos y producir efectos agudos como náuseas y vómitos, eritemas, caída del cabello, un síndrome agudo por radiación, lesiones locales (quemaduras por radiación) e incluso la muerte En las emergencias radiológicas y nucleares, las primeras personas en intervenir y el personal de la instalación
  • Ultraviolet radiation - World Health Organization (WHO)
    Ultraviolet (UV) radiation covers the wavelength range of 100–400 nm, which is a higher frequency and lower wavelength than visible light UV radiation comes naturally from the sun, but it can also be created by artificial sources used in industry, commerce and recreation
  • Radiation: Ultraviolet (UV) radiation
    Everyone is exposed to UV radiation from the sun and an increasing number of people are exposed to artificial sources used in industry, commerce and recreation The sun is by far the strongest source of ultraviolet radiation in our environment Solar emissions include visible light, heat and ultraviolet (UV) radiation Just as visible light consists of different colours that become apparent in
  • Radiation: The known health effects of ultraviolet radiation
    UV radiation can cause short- and long-term health effects on the skin In addition to the well-known short-term effects such as sunburn or allergic reactions, long-term effects like skin cancer represent a chronic health risk Skin cancer risk is strongly correlated with the duration and frequency of sun exposure over one’s lifetime





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