condenser
/kənˈdensə(r); kən`dɛnsɚ/ n
1 device for cooling vapour and condensing it to liquid 冷凝器.
2 device for receiving and storing an electric charge (esp in a car engine) 电容器.
3 mirror or lens that concentrates light, eg in a film projector 聚光镜; 聚光器.