1.球茎（如百合﹑ 洋葱﹑ 郁金香等植物的地下茎）
2.（也作light bulb）电灯泡 英语解释
- a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
- a rounded part of a cylindrical instrument (usually at one end)
- a rounded dilation or expansion in a canal or vessel or organ
- lower or hindmost part of the brain; continuous with spinal cord; (bulb‘ is an old term for medulla oblongata)
- electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity