bulb

植物的球茎

球茎状物；电灯泡

bulb

鳞茎, 球形物

bulb

1. a modified bud consisting of a thickened globular underground stem serving as a reproductive structure

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2. electric lamp consisting of a glass bulb containing a wire filament (usually tungsten) that emits light when heated

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3. a rounded part of a cylindrical instrument (usually at one end); "the bulb of a syringe"

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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"

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5. a rounded dilation or expansion in a canal or vessel or organ

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