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Webster 1913 Edition
irradiation
ir-raˊdi-a′tion
(ĭr-rāˊdĭ-ā′shŭn)
, Noun.
[Cf. F.
irradiation
.] 2.
Illumination; irradiance; brilliancy.
Sir W. Scott.
3.
Fig.: Mental light or illumination.
Sir M. Hale.
4.
(Opt.)
The apparent enlargement of a bright object seen upon a dark ground, due to the fact that the portions of the retina around the image are stimulated by the intense light; as when a dark spot on a white ground appears smaller, or a white spot on a dark ground larger, than it really is, esp. when a little out of focus.
Webster 1828 Edition
Irradiation
IRRADIA'TION
,Noun.
1.
Illumination; brightness.2.
Intellectual light.3.
The act of emitting minute particles or effluvia from some substance.Definition 2024
irradiation
irradiation
English
Noun
irradiation (countable and uncountable, plural irradiations)
- An act of irradiating, or state of being irradiated.
- (obsolete) illumination; irradiance; brilliance.
- (obsolete) figurative: mental light or illumination.
- (obsolete) the apparent enlargement of a bright object seen upon a dark ground, due to the fact that the portions of the retina around the image are stimulated by the intense light; as when a dark spot on a white ground appears smaller, or a white spot on a dark ground larger, than it really is, especially when a little out of focus.
- (uncountable) a process of sterilisation whereby radiation is passed through a bag containing food, utensils, etc., to sterilise the contents.
Derived terms
Translations
an act of irradiating, or state of being irradiated
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obsolete: illumination; irradiance; brilliance
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obsolete, figurative: mental light or illumination
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obsolete: the apparent enlargement of a bright object seen upon a dark ground
a process of sterilisation
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