Definition of rock alum in English:

rock alum

noun ˈrɒk ˌaləm

historical

Crystalline alum of high purity, especially that prepared from Italian alunite.

Origin

Mid 17th century. From rock + alum, after French alun de roche (1374 in Middle French; compare Anglo-Norman alome de roche, alum Roche, and Middle French (Tournai) alun en roque) or Italian allume di rocca. Compare post-classical Latin alumen de roca, alumen de rocco, Spanish alumbre de roque, and also Spanish piedra alumbre, Portuguese pedra-ume, in same sense, which show substitution of the respective Spanish and Portuguese reflexes of classical Latin petra rock, stone.

Definition of rock alum in US English:

rock alum

nounˈrɒk ˌaləm

historical

Crystalline alum of high purity, especially that prepared from Italian alunite.

Origin

Mid 17th century. From rock + alum, after French alun de roche (1374 in Middle French; compare Anglo-Norman alome de roche, alum Roche, and Middle French (Tournai) alun en roque) or Italian allume di rocca. Compare post-classical Latin alumen de roca, alumen de rocco, Spanish alumbre de roque, and also Spanish piedra alumbre, Portuguese pedra-ume, in same sense, which show substitution of the respective Spanish and Portuguese reflexes of classical Latin petra rock, stone.

词汇	rock alum
释义	Definition of rock alum in English: rock alum noun ˈrɒk ˌaləm historical Crystalline alum of high purity, especially that prepared from Italian alunite. Origin Mid 17th century. From rock + alum, after French alun de roche (1374 in Middle French; compare Anglo-Norman alome de roche, alum Roche, and Middle French (Tournai) alun en roque) or Italian allume di rocca. Compare post-classical Latin alumen de roca, alumen de rocco, Spanish alumbre de roque, and also Spanish piedra alumbre, Portuguese pedra-ume, in same sense, which show substitution of the respective Spanish and Portuguese reflexes of classical Latin petra rock, stone. Definition of rock alum in US English: rock alum nounˈrɒk ˌaləm historical Crystalline alum of high purity, especially that prepared from Italian alunite. Origin Mid 17th century. From rock + alum, after French alun de roche (1374 in Middle French; compare Anglo-Norman alome de roche, alum Roche, and Middle French (Tournai) alun en roque) or Italian allume di rocca. Compare post-classical Latin alumen de roca, alumen de rocco, Spanish alumbre de roque, and also Spanish piedra alumbre, Portuguese pedra-ume, in same sense, which show substitution of the respective Spanish and Portuguese reflexes of classical Latin petra rock, stone.
随便看	christiaan huygens Christian christianable Christian Aid Christian Brothers christian dior christian doctrine christian doppler Christian era box kite box-like box-like box-like box lunch box lunches box number box numbers box office box-office hit box offices box-office success box of tricks box of tricks boxout box pew