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alum 音标拼音: ['æləm] [əl'ʌm]

n. 明矾

明矾

WordNet (r) 3.0 (2006) (WordNet)

alum
n 1: a white crystalline double sulfate of aluminum: the
ammonium double sulfate of aluminum [synonym: {alum}, {ammonia
alum}, {ammonium alum}]
2: a white crystalline double sulfate of aluminum: the potassium
double sulfate of aluminum [synonym: {alum}, {potassium alum},
{potash alum}]
3: a person who has received a degree from a school (high school
or college or university) [synonym: {alumnus}, {alumna}, {alum},
{graduate}, {grad}]
4: a double sulphate of aluminum and potassium that is used as
an astringent (among other things)

The Collaborative International Dictionary of English v.0.48 (gcide)

Alum \Al"um\, n. [OE. alum, alom, OF. alum, F. alun, fr. L.
alumen alum.] (Chem.)
A double sulphate formed of aluminium and some other element
(esp. an alkali metal) or of aluminium. It has twenty-four
molecules of water of crystallization.
[1913 Webster]

Note: Common alum is the double sulphate of aluminium and
potassium. It is white, transparent, very astringent,
and crystallizes easily in octahedrons. The term is
extended so as to include other double sulphates
similar to alum in formula.
[1913 Webster]

Alum \Al"um\, v. t.
To steep in, or otherwise impregnate with, a solution of
alum; to treat with alum. --Ure.
[1913 Webster]

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英文字典中文字典相关资料:

Alum - Wikipedia
By itself, alum often refers to potassium alum, with the formula KAl (SO4)2·12H2O Other alums are named after the monovalent ion, such as sodium alum and ammonium alum
What Is Alum and How Is It Used? - ThoughtCo
Alum is a type of chemical compound that is commonly used in everyday and industrial applications You'll find alum in everything from baking powder and toothpaste to cosmetics and some fire extinguishers, but there are also various types of alum with different use cases
Alum | Definition, Uses, Formula, Facts | Britannica
Alums occur naturally in various minerals Potassium alum, for example, is found in the minerals kalinite, alunite, and leucite, which can be treated with sulfuric acid to obtain crystals of the alum Most alums have an astringent and acid taste They are colourless, odourless, and exist as a white crystalline powder
Alum (Fitkari) Uses: Benefits, Side Effects, and How to Use It Safely
Discover what alum is, its many uses—from skincare to water purification its surprising benefits, possible side effects, and how to use it safely in everyday routines
What is Alum | About Alum and Alum Substitution – McCormick
Alum, also known as potassium aluminum sulfate, is a naturally occurring mineral compound used across cultures and industries in various ways The most common type of alum found in kitchen pantries is potassium alum
Alum: What It Is, Medicinal Benefits, Dosage, and Side Effects
Alum is a naturally occurring mineral salt with powerful astringent, antibacterial, and deodorizing effects It is used in oral hygiene, wound care, water purification, food preservation, and natural deodorants
ALUM Definition Meaning - Merriam-Webster
A little over a hundred years ago the shortened form of alum began to be used to describe a graduate or past attendee of either gender Although many people feel that alum is informal, it is in increasing use, and we appear to be moving toward a greater acceptance of the word
Alum - Formula, Types, Production, Properties, Uses
Alum is widely used in industries as well as medical purposes It has antiseptic property and is used after shave It is often called "Fitkari " In this article, we learn about alum, its properties, different types of alum, its uses, and many more important facts related to it
Woman dies after 60-foot fall on Alum Cave Trail in Great Smoky . . . - WVLT
Alum Cave Trail is one of the most visited trails in Great Smoky Mountains National Park The trail provides direct access to Mount LeConte, which millions of people look to visit every year
Woman dies after fall from cliff in Great Smoky Mountains National Park
A woman died after falling from a cliff on Alum Cave Trail in Great Smoky Mountains National Park Here's what we know

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