bulb
英[b?lb]
美[b?lb]
- n. 電燈泡；鱗莖；球狀物
- vi. 生球莖；膨脹成球狀
英英釋意
- 1. a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
- 2. electric lamp consisting of a glass bulb containing a wire filament (usually tungsten) that emits light when heated
- 3. a rounded part of a cylindrical instrument (usually at one end);
- "the bulb of a syringe"
- 4. lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata);
- "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning"
- 5. a rounded dilation or expansion in a canal or vessel or organ