expansion

拡大、膨張

大きさが増したり、占める空間が広がったりすること。

やさしい英語で： The process of becoming larger or covering more space.

• Heat causes the expansion of metal.
• The company plans further expansion overseas.
• Rapid urban expansion has destroyed many farms.

使い方： expansion of something (The expansion of the town has increased traffic.)

類義語： growth, enlargement

反対語： contraction

よく使う表現： rapid expansion, expansion of something, business expansion

拡張パック、拡張セット

持っているゲームなどに新しい内容や機能を加える追加商品。

やさしい英語で： An extra product that adds new content or features to something you already own.

• This expansion adds new characters.
• You need the original game to use the expansion.
• We bought two expansions for our favorite board game.

類義語： add-on

よく使う表現： an expansion pack, a game expansion, buy an expansion

増築部分、増設部分

建物など、すでにあるものに新しく付け加えられた部分。

やさしい英語で： A new part added to a building or other existing thing.

• The expansion includes six new rooms.
• Our office is in the new expansion.
• They opened the hospital expansion last spring.

類義語： extension, addition

よく使う表現： a hospital expansion, a new expansion, the office expansion

正式名称、展開形

略した名前や文字の組み合わせが表す、元の言葉の全体。

やさしい英語で： The full words represented by a shortened name or group of letters.

• The expansion of BBC is British Broadcasting Corporation.
• The guide gives the expansion of each abbreviation.
• This acronym has two possible expansions.

使い方： expansion of something (The expansion of this abbreviation appears in the glossary.)

類義語： full form

よく使う表現： acronym expansion, expansion of something, the full expansion

熱膨張係数

温度が一度上がるごとに、物質の長さがどれだけ増えるかを示す数。

やさしい英語で： A number showing how much a material grows longer for each degree its temperature rises.

• The table gives the expansion of steel.
• Engineers compared the expansion of the two alloys.
• We used the expansion coefficient to calculate the final length.

類義語： coefficient of thermal expansion

よく使う表現： thermal expansion, expansion coefficient, linear expansion