n. 1.【植物；植物学】球根；鳞茎。 2.球状物；(寒暑表的)水银球；灯泡；烧瓶；真空管；测温包。 3.【解剖学】球；〔pl.〕扁桃腺。 4.(照相机的)快门。 5.(汽车的)圆顶车壳；【航海】球形船首。 短语和例子 a lily bulb 百合根。 an electric bulb 电灯泡。 the bulb of a hair 毛球，发根。 the bulb of the eye 眼球。 the bulb of the spinal cord 【解剖学】延髓。 vi. 1.生球茎。 2.肿[涨]成球，形成球状。 adj. -ed 1.有鳞[球]茎的。 2.鳞[球]茎形，圆形的。
a rounded part of a cylindrical instrument (usually at one end); "the bulb of a syringe"
electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity 同义词：light bulb, lightbulb, incandescent lamp, electric light, electric-light bulb,
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); "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning" 同义词：medulla oblongata, medulla,
a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
anything with a round shape resembling a teardrop
A bulb is a short stem with fleshy leaves or leaf bases.Bell, A.
例句与用法
1.
The bulbs should be enclosed in safety shields . 灯泡应装在安全罩内。
2.
A bright electric bulb glowed above our heads . 通亮的灯泡在我们头上闪闪发光。
3.
The new plant forms new bulbs in vegetative reproduction . 增殖性繁殖新株长成新鳞茎。
4.
V is the volume of the bulb . V代表球泡的体积。
5.
The top of the bulb cd must be at a lower level than mark b . 球管CD的顶应低于标记B的水平面。
6.
To suction with a bulb syringe, push bulb in with your thumb . 用球吸引器时先用拇指把球压扁。
7.
It's a bulb pressure tester for detecting battery leaks . 这是检测电瓶漏气用的胶球压力试验器。
8.
The lack of air in the bulb prevents the filament from burning up . 灯泡内缺乏空气就使灯丝不致烧掉。
9.
I must get those bulbs planted before the cold weather sets in . 我得在天气转冷之前把这些球茎秧种上。
10.
I have sent off for those bulbs i saw advertised in the paper . 我已写信订购我在报纸广告上看到的那种灯泡。
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