- (also light bulb)
the glass part that fits into an electric lamp, etc. to give light when it is switched on 电灯泡 
a halogen bulb 卤素灯泡 a room lit by bare bulbs (= with no decorative cover) 只有光秃秃的电灯泡照明的屋子（无灯罩、灯饰）
Extra ExamplesCan you remove the bulb and replace it with an energy-efficient one? 你能将那个灯泡取下来换上一个节能灯泡吗？ Can you take out the clear bulb and put a pearl one in? 你能将那个透明灯泡取出来换上一个磨砂灯泡吗？ Coloured bulbs flashed on and off around the sign. 标牌周围闪烁着彩灯。 I think the bulb is going to go. It's been flickering all evening. 我想这只灯泡就要坏了，它整个晚上一直在闪。 Switch the light off before you change the bulb. 换灯泡前把灯关上。 The fitting in the kitchen takes a fluorescent bulb. 厨房的配备可使用荧光灯泡。 These low-energy bulbs last much longer than the ordinary ones. 这些低耗能灯泡比普通灯泡寿命长。 They sat reading by the light of a 40-watt bulb. 他们坐着，借着一只40瓦灯泡发出的光读书。
Oxford Collocations Dictionaryadjective- electric
- light
- 100-watt
- …
- change
- replace
- remove
- …
- light something
- go
- flicker
- …
the round underground part of some plants, like an onion in shape, that grows into a new plant every year （植物）鳞茎 
the bulb fields of Holland 荷兰的球茎田
Extra ExamplesTopics Plants and treesc1These daffodils flower so early because the bulbs have been forced. 这些水仙花开得这么早是因为鳞茎经过催育。 The bulbs were over. All that remained of them were clumps of brown leaves. 这些鳞茎死了，剩下的只是一丛丛的黄叶子。 She usually waters the indoor bulbs once a week. 她通常每星期给室内的鳞茎浇一次水。 Place the bulbs close together. 把这些鳞茎密集地埋种在一起。 Over the years the bulbs gradually increase. 年复一年，鳞茎逐渐长大了。 I'm planting some bulbs for next year. 我正在种一些鳞茎，为明年生长做准备。 Get the bulbs into the ground, or they will begin to shrivel. 把鳞茎种到地里，否则会开始干枯的。
Oxford Collocations Dictionaryadjective- flower
- spring
- spring-flowering
- …
- place
- plant
- dig up
- …
- grow
- flower
- sprout
- …
an object that is like a bulb in shape, for example the end of a thermometer 鳞茎状物（如温度计的球部）
Word Originlate Middle English: via Latin from Greek bolbos ‘onion, bulbous root’.