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Origin and history of radon

radon(n.)

the heaviest gaseous element, short-lived and radioactive, 1918, from German Radon, from radium (q.v.) + -on suffix of inert gases. The element was identified in radioactive decay of radium. Alternative name niton (from Latin nitens "shining") gained currency in France and Germany.

also from 1918

Entries linking to radon

radium(n.)

radioactive metallic alkaline earth element, 1899, from French radium, formed in Modern Latin from Latin radius "ray" (see radius). With metallic element ending -ium. Named 1898 after identification by Marie Curie and her husband; so called for its power of emitting energy in the form of rays.

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    Trends of radon

    adapted from books.google.com/ngrams/ with a 7-year moving average; ngrams are probably unreliable.

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    element
    c. 1300, "earth, air, fire, or water; one of the four things regarded by the ancients as the constituents of all things," from Old French element (10c.), from Latin elementum "rudiment, first principle, matter in its most basic form" (translating Greek stoikheion), origin and ori
    atomic
    "pertaining to atoms," 1670s as a philosophical term (see atomistic); scientific sense dates from 1811, from atom + -ic. Atomic number is attested from 1821; atomic mass is from 1848. Atomic energy is recorded by 1906 in the modern sense (as intra-atomic energy from 1903). March
    number
    c. 1300, "sum, aggregate of a collection," from Anglo-French noumbre, Old French nombre and directly from Latin numerus "a number, quantity," from PIE root *nem- "assign, allot; take." The meaning "written symbol or figure of arithmetic value" is from late 14c. The meaning "singl
    hermaphrodite
    late 14c. (harmofroditus), from Latin hermaphroditus, from Greek hermaphroditos "person partaking of the attributes of both sexes," as a proper name, the son of Hermes and Aphrodite, who, in Ovid, was loved by the nymph Salmacis so ardently that she prayed for complete union with
    stress
    c. 1300, stresse, "hardship, adversity; constraining or compelling force or pressure, coercion;" the original senses are mostly archaic or obsolete. The word is in part a shortening of distress (n.) and in part from Old French estrece "narrowness, oppression," from Vulgar Latin *
    lackadaisical
    "sentimentally woebegone" [Century Dictionary], 1768, lack-adaysical (Sterne), from interjection lackadaisy "alas, alack" (1748), a ludicrous alteration of lack-a-day (1690s), an exclamation of sorrow or regret, from alack the day (1590s). Hence, "given to crying 'lack-a-day,' va
    rehabilitation
    1530s, "act of reinstating in a former rank or standing," from French réhabilitation and directly from Medieval Latin rehabilitationem (nominative rehabilitatio) "restoration," noun of action from past-participle stem of rehabilitare, from re- "again" (see re-) + habitare "make f
    crepuscular
    figurative use, "dim, indistinct," is attested from 1660s; literal use, "pertaining to or resembling twilight," from 1755, from Latin crepusculum "twilight, dusk," related to creper "obscure, uncertain," from Proto-Italic *krepos "twilight," which is of uncertain origin. It is no
    salon
    1690s, "large room or apartment in a palace or great house," from French salon "reception room" (17c.), from Italian salone "large hall," from sala "hall," from a Germanic source (compare Old English sele, Middle English salle, Old Norse salr "hall," Old High German sal "hall, ho
    gig
    "light, two-wheeled carriage, usually drawn by one horse" (1791), also "small boat," 1790, perhaps imitative of bouncing. There was a Middle English ghyg "spinning top" (in whyrlegyg, mid-15c.), also "giddy girl" (early 13c., also giglet), from Old Norse geiga "turn sideways," or

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