alum

exalumno, egresado

Persona que estudió anteriormente en una escuela o universidad determinada.

En inglés sencillo: Someone who previously studied at a particular school, college, or university.

• My sister is a college alum.
• Several alums returned to campus for the reunion.
• Are you an alum of this university?

Cómo se usa: an alum of something (She is an alum of the local college.)

Sinónimos: former student, alumnus, alumna

Expresiones frecuentes: a college alum, a university alum, a fellow alum

alumbre

Sal de cristales claros usada para tratar cuero, fijar tintes en telas y elaborar algunos medicamentos.

En inglés sencillo: A pale crystal salt used to treat leather, fix colors in cloth, and in some medicines.

• Dissolve the alum in warm water.
• The dyer added alum to help the color stay in the wool.
• Small alum crystals formed at the bottom of the jar.

Sinónimos: potassium alum

Expresiones frecuentes: potassium alum, alum crystals, alum powder

alumbre

Cualquier sal cristalina de estructura química semejante al alumbre común de potasio y aluminio.

En inglés sencillo: Any of a group of crystal salts with a chemical structure similar to the common potassium and aluminium salt.

• The laboratory stores several kinds of alum.
• Ammonium alum forms clear crystals.
• Chrome alum contains chromium in place of aluminium.

Expresiones frecuentes: ammonium alum, chrome alum, an alum crystal

alumbrar

Tratar o remojar algo con alumbre, a menudo antes de teñir una tela.

En inglés sencillo: To soak or treat something with a particular crystal salt, often before coloring cloth.

• First, alum the wool.
• The workers alumed the cloth before dyeing it.
• She alums each piece of fabric in a warm solution.

Expresiones frecuentes: alum the wool, alum the cloth, alum before dyeing