IRRADIATION

radiotherapy, radiation therapy, radiation, actinotherapy, irradiation

(noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance

irradiation

(noun) (Pavolvian conditioning) the elicitation of a conditioned response by stimulation similar but not identical to the original stimulus

irradiation

(noun) the apparent enlargement of a bright object when viewed against a dark background

irradiation

(noun) (physiology) the spread of sensory neural impulses in the cortex

beam, beam of light, light beam, ray, ray of light, shaft, shaft of light, irradiation

(noun) a column of light (as from a beacon)

irradiation

(noun) the condition of being exposed to radiation

Source: WordNet® 3.1


Etymology

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.

Source: Wiktionary


Ir*ra`di*a"tion, n. Etym: [Cf. F. irradiation.]

1. Act of irradiating, or state of being irradiated.

2. Illumination; irradiance; brilliancy. Sir W. Scott.

3. Fig.: Mental light or illumination. Sir M. Hale.

4. (Opt.)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

26 November 2024

TRANSPOSITION

(noun) (music) playing in a different key from the key intended; moving the pitch of a piece of music upwards or downwards


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Coffee Trivia

Plain brewed coffee contains almost no calories, while coffee with dairy products, sugar, and other flavorings is much higher in calories. An espresso has 20 calories. A nonfat latte has 72, while a flavored one has 134.

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