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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

process, physical process go
a sustained phenomenon or one marked by gradual changes through a series of states

phenomenon go
any state or process known through the senses rather than by intuition or reasoning

natural phenomenon go
all phenomena that are not artificial

physical phenomenon go
a natural phenomenon involving the physical properties of matter and energy

energy, free energy go
(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work

radiation go
energy that is radiated or transmitted in the form of rays or waves or particles

electromagnetic radiation, electromagnetic wave, nonparticulate radiation go
radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge

actinic radiation, actinic ray go
electromagnetic radiation that can produce photochemical reactions

light, visible light, visible radiation
(physics) electromagnetic radiation that can produce a visual sensation

noun.phenomenon

23 Subcategories

irradiation, ray, shaft, beam, beam of light, light beam, ray of light, shaft of light go
a column of light (as from a beacon)
candlelight, candle flame go
the light provided by a burning candle
corona go
one or more circles of light seen around a luminous object
counterglow, gegenschein go
a faint spot of light in the night sky that appears directly opposite the position of the sun
daylight go
light during the daytime
firelight go
the light of a fire (especially in a fireplace)
fluorescence go
light emitted during absorption of radiation of some other (invisible) wavelength
jack-o'-lantern, will-o'-the-wisp, ignis fatuus, friar's lantern go
a pale light sometimes seen at night over marshy ground
gaslight go
light yielded by the combustion of illuminating gas
radiance, glow, glowing go
the amount of electromagnetic radiation leaving or arriving at a point on a surface
glow go
a steady even light without flames
half-light go
a greyish light (as at dawn or dusk or in dim interiors)
glow, incandescence go
the phenomenon of light emission by a body as its temperature is raised
lamplight go
light from a lamp
luminescence go
light not due to incandescence
meteor, shooting star go
a streak of light in the sky at night that results when a meteoroid hits the earth's atmosphere and air friction causes the meteoroid to melt or vaporize or explode
moonshine, Moon, moonlight go
the light of the Moon
starlight go
the light of the stars
sunshine, sun, sunlight go
the rays of the sun
scintillation go
(physics) a flash of light that is produced in a phosphor when it absorbs a photon or ionizing particle
streamer go
light that streams
torchlight go
light from a torch or torches
twilight go
the diffused light from the sky when the sun is below the horizon but its rays are refracted by the atmosphere of the earth