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Origin and history of irradiation

irradiation(n.)

1580s, in reference to light (literally and figuratively), from French irradiation, noun of action from past participle stem of Latin irradiare (see irradiate). Of X-rays, etc., from 1901.

also from 1580s

Entries linking to irradiation

irradiate(v.)

c. 1600, "to cast beams of light upon," from Latin irradiatus, past participle of irradiare "shine forth, beam upon, illumine," from assimilated form of in- "into, in" (from PIE root *en "in") + radiare "to shine" (see radiate (v.)). Meaning "expose to radiation other than light" (originally X-rays) is from 1901. Related: Irradiated; irradiating.

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    beam
    Old English beam, "living tree," but by late 10c. also "rafter, post, ship's timber," from Proto-Germanic *baumaz "tree" (source also of Old Frisian bam "tree, gallows, beam," Middle Dutch boom, Old High German boum, German Baum "tree," and perhaps also (with unexplained sound ch
    ray
    "beam of light, light emitted in a given direction from a luminous body," early 14c., rai, from Old French rai (nominative rais) "ray (of the sun), spoke (of a wheel); gush, spurt," from Latin radius "ray, spoke, staff, rod" (see radius). Not common before 17c. [OED]; of the sun,
    shaft
    "long, slender rod," originally "staff or pole forming the body of a spear or lance; spear-shaft," also, perhaps by synecdoche, "spear;" Middle English shafte, from Old English sceaft from Proto-Germanic *skaftaz (source also of Old Norse skapt, Old Saxon skaft, Old High German s
    semblance
    c. 1300, semblaunce, "fact of appearing to view," from Old French semblance "likeness, appearance," from semblant, present participle of sembler "to seem, appear," from Latin simulare "to resemble, imitate," from similis "like, resembling, of the same kind" (see similar). The mea
    status
    1670s, "height" of a situation or condition, later "legal standing of a person" (1791), from Latin status "condition, position, state, manner, attitude," from past-participle stem of stare "to stand" (from PIE root *sta- "to stand, make or be firm"). In law, the meaning "legal st
    spread
    late 12c., spreden, "stretch out, lay out (clothes, hide, etc.); diffuse, disseminate (beams of light, grace);" also, of groups of persons, "advance over a wide area" (intransitive); probably from Old English *sprædan "to spread, stretch forth, extend" (especially in tosprædan "t
    illusion
    mid-14c., "mockery, scorning, derision;" late 14c., "act of deception; deceptive appearance, apparition; delusion of the mind," from Old French illusion "a mocking, deceit, deception" (12c.), from Latin illusionem (nominative illusio) "a mocking, jesting, jeering; irony," from pa
    light
    "brightness, radiant energy, that which makes things visible," Old English leht (Anglian), leoht (West Saxon), "light, daylight; spiritual illumination," from Proto-Germanic *leukhtam (source also of Old Saxon lioht, Old Frisian liacht, Middle Dutch lucht, Dutch licht, Old High G
    condition
    mid-14c., condicioun, "particular mode of being of a person or thing," also "a requisite or prerequisite, a stipulation," from Old French condicion "stipulation; state; behavior; social status" (12c., Modern French condition), from Medieval Latin conditionem (nominative conditio)
    radiation
    mid-15c., radiacion, "act or process of emitting light," from Latin radiationem (nominative radiatio) "a shining, radiation," noun of action from past-participle stem of radiare "to beam, shine, gleam; make beaming," from radius "beam of light; spoke of a wheel" (see radius). Mea

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