piston
/ˈpɪstən/
B2 · Upper Int.★★☆☆☆
Simple Meaning
发动机内部上下移动以驱动发动机工作的部件。
When to Use
⚙️Technical💼Workplace English
Upper Intermediate — fluent in familiar topics
Examples in Conversation
“修理工说我车里的活塞坏了。”
“活塞在汽车发动机内运动得非常快。”
Learning Path
▶Full Definition
A solid disk or cylinder that fits inside a hollow cylinder, and moves under pressure (as in an engine) or displaces fluid (as in a pump)