slider
noun /ˈslaɪdə(r)/
/ˈslaɪdər/
- a device for controlling something such as the volume of a radio, which you slide up and down or from side to side
（控制收音机音量等的）滑杆，滑动器 - (computing
计算机 浮动块；滑动条；滑块 - a freshwater turtle from North America
红腹彩龟（北美淡水龟）