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alum

From Wiktionary, the free dictionary
See also:alúmandālum

English

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Alum (double sulphate of potassium and aluminum)
EnglishWikipedia has an article on:
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Alternative forms

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Etymology 1

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    FromMiddle Englishalum,alum,alym,alyme, fromAnglo-Normanalum,alun, fromLatinalūmen.

    Pronunciation

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    Noun

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    alum (countable anduncountable,pluralalums)

    1. Anastringentsalt, usually occurring in the form of palecrystals, much used in thedyeing andtanning trade and in certainmedicines, and now understood to be a doublesulphate ofpotassium andaluminium (K2SO4·Al2(SO4)3·24H2O).[from 14th c.]
      • 1991, Felix Gilbert,The Pope, His Banker, and Venice,page80:
        Venice also neededalum for trade, since it was the point of departure for overland transportation ofalum to southern Germany and its cloth-manufacturing Free Cities.
      • 2011, Thomas Penn,Winter King, Penguin, published2012, page201:
        A natural astringent and antiseptic, potassiumalum was coveted for its medicinal and cosmetic properties.
    2. (inorganic chemistry) Any similar double sulphate in which either or both of thepotassium andaluminium is wholly or partly replaced by otherunivalent ortervalentcations.[from 17th c.]
      • 1807, William Nicholson, editor,A Journal of Natural Philosophy, Chemistry, and the Arts, volume XVIII,page286:
        With weld and cochineal, which are colouring matters the most sensible to the action of sulphate of iron, the purifiedalums gave us colours more brilliant, fresh, and in a slight degree lighter; while those with our commonalums were all duller, and evidently of a deeper hue.
      • 2000 June,Competition Science Vision,page486:
        For similar reasons, aluminium sulphate andalums are used in dyeing cloth.[]Normallyalums are soluble in water and insoluble in alcohols.
      • 2005, Amit Arora,Text Book Of Inorganic Chemistry,page386:
        In structure, thealums consist of simple ions, being not complexes, but double salts. Potashalum or potassiumalum is the commonalum, with the formula KAl(SO4)2·12H2O) which, for convenience, may be written K2SO4·Al2(SO4)3·24H2O
    Synonyms
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    • (double sulphate of potassium and aluminum):potash alum
    Translations
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    chemistry: double sulfate

    Derived terms

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    Related terms

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    See also

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    Verb

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    alum (third-person singular simple presentalums,present participlealuming,simple past and past participlealumed)

    1. (transitive) Tosteep in, or otherwiseimpregnate with, asolution ofalum; totreat with alum.
      • 1839,Andrew Ure,A Dictionary of Arts, Manufactures, and Mines:
        The silk should be boiled at the rate of 20 parts of soap per cent. , and thenalumed. Thealuming need not be so strong as for the fine crimson
      • 1979, Kax Wilson,A History of Textiles, Westview Press,→ISBN, page90:
        After drying, the cloth wasalumed and finally dyed.
    Derived terms
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    Translations
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    To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.

    Etymology 2

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      Clipping ofalumnus andalumna (> alumn- > alum), by the removal of the originallyLatingender-specificnominative singular case endings-us (masculine) and-a (feminine).

      Pronunciation

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      Noun

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      alum (pluralalumsoralumni)

      1. (Canada, US) A pastattendee orgraduate (of any gender) of a college, university or other educational institution.
        • 1961 Spring,Anchora of Delta Gamma, Volume LXXVII, No. 3,page 59,
          Evanston-North Shorealums are happy to open their homes to Sigma actives for special social events.
        • 2006, Ted Hart, James M. Greenfield, Pamela M. Gignac, Christopher Carnie,Major Donors: Finding Big Gifts in Your Database and Online,page47:
          You'll remember that we're starting with a list of slightly over 7,000 names that arealums (most of them over 50) that we'd like to whittle down to a manageable list of prospects.
        • 2009, Timothy C. Jacobson,Charity & Merit: Trinity School at 300,page190:
          All schools that last havealums, and, ancient as it was by American standards, Trinity by mid-century had thousands.
        • 2024 June 5, Shirley Li, “This Show Understands the Absurdity of Modern Existence”, inThe Atlantic[1], archived fromthe original on5 June 2024:
          “It breaks my heart to see them naked, undignified, shivering in the cold as they swallow our daily filth,” proclaims the woman, played by theSaturday Night Livealum Aidy Bryant.
        • 2024 August 8, Jonathan van Harmelen, “The Little-Known Group That Pioneered Watergate’s Dirty Tricks—and Changed American Politics”, inTIME[2], archived fromthe original on14 August 2024:
          While presidential elections have been marred by mudslinging since the early Republic, these USCalums deployed a particular type of dirty tricks: what became known as “ratf--king,” or the use of unscrupulous tactics to interfere with the campaigns of opponents. The tactics pioneered by members of Trojans for Representative Government and later CREEP set a precedent for the sort of organized political sabotage that has become commonplace today in a digital world, especially for Republicans.
      Synonyms
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      Hyponyms
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      Anagrams

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      Indonesian

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      Pronunciation

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      Etymology 1

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      Borrowed fromJavaneseꦲꦭꦸꦩ꧀(alum,not shining, wilted; weak; almost healed), fromOld Javanesealum,alūm,alöm(withered), ultimately probably fromProto-Mon-Khmer*t₂ʔum,*t₂ʔuum(rotten).

      Adjective

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      alum (comparativelebih alum,superlativepaling alum)

      1. wither
        Synonym:layu
      2. livid

      Noun

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      alum (pluralalum-alum)

      1. bruise
        Synonyms:lebam,memar

      Etymology 2

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      (Thisetymology is missing or incomplete. Please add to it, or discuss it at theEtymology scriptorium.)

      Noun

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      alum (pluralalum-alum)

      1. coir for washing kitchen utensils, made from synthetic fibers with a rough texture
        Synonym:tapas

      Etymology 3

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      (Thisetymology is missing or incomplete. Please add to it, or discuss it at theEtymology scriptorium.)

      Noun

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      alum (pluralalum-alum)

      1. seven-eyedboil

      Further reading

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      Javanese

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      Romanization

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      alum

      1. romanization ofꦲꦭꦸꦩ꧀

      Latin

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      Etymology

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      Unknown.

      Pronunciation

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      Noun

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      ālum n (genitiveālī);second declension

      1. garlic
      2. species ofcomfrey plant

      Declension

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      Second-declension noun (neuter).

      singularplural
      nominativeālumāla
      genitiveālīālōrum
      dativeālōālīs
      accusativeālumāla
      ablativeālōālīs
      vocativeālumāla

      Synonyms

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      • (garlic, species of comfrey plant):ālus

      Noun

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      ālum

      1. accusativesingular ofālus

      References

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      • alum”, inGaffiot, Félix (1934),Dictionnaire illustré latin-français, Hachette.
      • alum”, inCharlton T. Lewis and Charles Short (1879),A Latin Dictionary, Oxford: Clarendon Press

      Latvian

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      Noun

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      alum m

      1. dativesingular ofalus

      Middle English

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      Noun

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      alum

      1. alternative form ofalym

      Old English

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      Noun

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      ālum

      1. dativeplural ofāl

      Old French

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      Alternative forms

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      Etymology

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      Etymology tree
      Proto-Indo-European*h₂elut-
      Proto-Indo-European*-mn̥
      Proto-Italic*-men
      Latin-men
      Latinalūmen
      Old Frenchalum

        Inherited fromLatinalūmen.

        Noun

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        alumoblique singularm (oblique pluralaluns,nominative singularaluns,nominative pluralalum)

        1. alum

        Descendants

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        References

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        Tausug

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        Etymology

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        Inherited fromProto-Philippine*áləm. CompareCebuanoalom(mole).

        Pronunciation

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        • (Sinūgan Parianun)IPA(key): /ʔalum/[ʔɑˈlum]
        • Rhymes:-um
        • Syllabification:a‧lum

        Noun

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        alum (Sulat Sūg spellingاَلُمْ)

        1. bruise
          Mataudalum ha baran niya.
          There are lots ofbruises on his body.
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