alum

卒業生、出身者

以前、ある学校や大学で学んでいた人。

やさしい英語で： 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?

使い方： an alum of something (She is an alum of the local college.)

類義語： former student, alumnus, alumna

よく使う表現： a college alum, a university alum, a fellow alum

ミョウバン

皮革加工や布の色止め、一部の薬に使われる淡い色の結晶状の塩。

やさしい英語で： 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.

類義語： potassium alum

よく使う表現： potassium alum, alum crystals, alum powder

ミョウバン

一般的なカリウムとアルミニウムのミョウバンに似た構造を持つ結晶塩。

やさしい英語で： 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.

よく使う表現： ammonium alum, chrome alum, an alum crystal

ミョウバンで処理する

布を染める前などに、ミョウバンに浸したり、ミョウバンで処理したりする。

やさしい英語で： 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.

よく使う表現： alum the wool, alum the cloth, alum before dyeing