bulb

電球

電灯の中で光を出す部分。通常は交換できる。

やさしい英語で： The part of an electric lamp that produces light and can usually be replaced.

• This lamp needs a new bulb.
• I changed the bulb in the kitchen.
• Are these bulbs bright enough for reading?

類義語： light bulb

よく使う表現： light bulb, replace a bulb, a spare bulb

球根

土の中で養分を蓄え、新しい植物に育つ丸い部分。

やさしい英語で： A round underground plant part that stores food and can grow into a new plant.

• Plant the bulb in the soil.
• These tulip bulbs will flower in spring.
• We dug up the bulbs after the leaves died.

よく使う表現： tulip bulb, plant a bulb, flower bulb

球状部、膨大部

一方の端が丸く膨らみ、もう一方が細くなった固形の物や部分。

やさしい英語で： A solid part or object with one rounded, wider end and one narrower end.

• The handle ends in a smooth bulb.
• A solid glass bulb decorated the stem.
• The diagram showed the bulb at the artery’s base.

よく使う表現： a rounded bulb, a glass bulb, bulb of something