alum


Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.

al·um 1

 (ăl′əm)
n.
Any of various double sulfates of a trivalent metal such as aluminum, chromium, or iron and a univalent metal such as potassium or sodium, especially hydrous aluminum potassium sulfate, AlK(SO4)2·12H2O, widely used in industry as clarifiers, hardeners, and purifiers and medicinally as topical astringents and styptics.

[Middle English, from Old French, from Latin alūmen.]

a·lum 2

 (ə-lŭm′)
n. Informal
An alumna or alumnus.

alum

(ˈæləm)
n
1. (Elements & Compounds) Also called: potash alum a colourless soluble hydrated double sulphate of aluminium and potassium used in the manufacture of mordants and pigments, in dressing leather and sizing paper, and in medicine as a styptic and astringent. Formula: K2SO4.Al2(SO4)3.24H2O
2. (Elements & Compounds) any of a group of isomorphic double sulphates of a monovalent metal or group and a trivalent metal. Formula: X2SO4.Y2(SO4)3.24H2O, where X is monovalent and Y is trivalent
[C14: from Old French, from Latin alūmen]

alum

n
informal chiefly US and Canadian an alumnus or alumna

al•um1

(ˈæl əm)

n.
1. a crystalline solid, aluminum potassium sulfate, K2SO4∙Al2(SO4)3∙24H2O, used as an astringent and styptic and in dyeing and tanning.
2. any of a class of analogous double sulfates.
[1275–1325; Middle English < Anglo-French < Latin alūmen]

a•lum2

(əˈlʌm)

n.
an alumna or alumnus.
[by shortening]

alum.

aluminum.

al·um

(ăl′əm)
Any of various crystalline salts in which a metal such as aluminum or chromium is combined with another metal such as potassium or sodium, especially aluminum potassium sulfate. Alum is widely used in industry as a hardener and purifier, and in medicine to induce vomiting and stop bleeding.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.alum - a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
Al, aluminium, aluminum, atomic number 13 - a silvery ductile metallic element found primarily in bauxite
double salt - a solution of two simple salts that forms a single substance on crystallization
2.alum - a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
Al, aluminium, aluminum, atomic number 13 - a silvery ductile metallic element found primarily in bauxite
double salt - a solution of two simple salts that forms a single substance on crystallization
3.alum - a person who has received a degree from a school (high school or college or university)alum - a person who has received a degree from a school (high school or college or university)
Ivy Leaguer - a student or graduate at an Ivy League school
old boy - a former male pupil of a school
bookman, scholar, scholarly person, student - a learned person (especially in the humanities); someone who by long study has gained mastery in one or more disciplines
4.alum - a double sulphate of aluminum and potassium that is used as an astringent (among other things)
astringent, astringent drug, styptic - a drug that causes contraction of body tissues and canals
Translations

alum

[ˈæləm] Nalumbre m

alum

nAlaun m

alum

n alumbre m
References in classic literature ?
The soil of this immense region is strongly impregnated with sulphur, copperas, alum, and glauber salts; its various earths impart a deep tinge to the streams which drain it, and these, with the crumbling of the banks along the Missouri, give to the waters of that river much of the coloring matter with which they are clouded.
But it is time that we took our order, for methinks that between the Needle rocks and the Alum cliffs yonder I can catch a glimpse of the topmasts of the galleys.
Our borough's museum is just five miles from England's first successful alum works, and most of the country's alum was made in this corner of Yorkshire.
Mick Slight gained the Alum a point in the singles in his draw with Brain Campbell, as did Gary Surtees in his match with John Nicholson.
Vasilica, of Alum Rock Road, and Cristian, of Cotterills Lane, pleaded not guilty at the city's Crown Court in June 2014 to four counts of holding a person in slavery or servitude.
is open to every Shrewsbury High alum, and to their guests.
In reply to a question, she said water for human consumption must be filtered, in case the required domestic gadget is not available then it must be boiled for at least 10 minutes and once it cools down should be sieved and subjected to alum treatment till all dirt or impurities settle down.
Tony Garcia, UO Law School alum, JAG Corp with National Guard
The calcium carbonate was included to prevent the acidic alum from significantly increasing the water's acidity.
The Solicitors Regulation Authority said it had received information which indicates an office operating as Gokciler & Co and ACS Associates at 88 Bowyer Road, Alum Rock, is not a legitimate branch office operating by those names.
Sade Aguila, also a CCAP and ProStart alum and graduate of Food & Finance High School who was the 2011 America's Best High School Chef, placed only .
The study conducted over animal models showed that it helped protein antigens to induce an immune response more than six times stronger than when alum was used.