| 释义 |
noun ˈaləmˈæləm mass nounChemistry 1A colourless astringent compound which is a hydrated double sulphate of aluminium and potassium, used in solution in dyeing and tanning. Chemical formula: AlK(SO₄)₂.12H₂O Example sentencesExamples - This, washed and then boiled, yielded aluminium sulphate, which, when ammonia was added, became alum.
- One site said that clarifying agents could control snails, so I sent my son to the chemist for alum.
- Astringent varieties contain alum, which makes your mouth pucker when the fruits are eaten before they're fully ripe.
- I have no idea how it's manufactured, but it's a kind of alum, a double sulfate of aluminum in crystal salt form.
- It could also be treated by rubbing salt, brain or potash alum into the surface to produce a very pale leather.
- 1.1count noun Any of a number of analogous crystalline double sulphates of a monovalent metal (or group) and a trivalent metal.
artificially grown crystals of one of the alums Example sentencesExamples - Several decades later the Englishman Davy attempted to obtain the metal hidden in alums.
- Aluminium dross tailings were used to produce two types of alums.
Origin Late Middle English: via Old French from Latin alumen, alumin- related to aluta 'tawed leather'. noun əˈlʌməˈləm US informal A former pupil or student of a school, college, or university; an alumnus or alumna.
Origin Late 19th century: abbreviation of alumnus or alumna. nounˈaləmˈæləm Chemistry 1A colorless astringent compound that is a hydrated double sulfate of aluminum and potassium, used in solution medicinally and in dyeing and tanning. Chemical formula: AlK(SO₄)₂.12H₂O Example sentencesExamples - Astringent varieties contain alum, which makes your mouth pucker when the fruits are eaten before they're fully ripe.
- I have no idea how it's manufactured, but it's a kind of alum, a double sulfate of aluminum in crystal salt form.
- It could also be treated by rubbing salt, brain or potash alum into the surface to produce a very pale leather.
- This, washed and then boiled, yielded aluminium sulphate, which, when ammonia was added, became alum.
- One site said that clarifying agents could control snails, so I sent my son to the chemist for alum.
- 1.1 Any of a number of analogous crystalline double sulfates of a monovalent metal (or group) and a trivalent metal.
artificially grown crystals of one of the alums Example sentencesExamples - Several decades later the Englishman Davy attempted to obtain the metal hidden in alums.
- Aluminium dross tailings were used to produce two types of alums.
Origin Late Middle English: via Old French from Latin alumen, alumin- related to aluta ‘tawed leather’. nounəˈləməˈləm US informal A former pupil or student of a school, college, or university; an alumnus or alumna.
Origin Late 19th century: abbreviation of alumnus or alumna. |