"bulbs" in the noun sense
1. bulb
a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
2. light bulb, lightbulb, bulb, incandescent lamp, electric light, electric-light bulb
electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
3. bulb
a rounded part of a cylindrical instrument (usually at one end
"the bulb of a syringe"
4. bulb
anything with a round shape resembling a teardrop
5. medulla oblongata, medulla, bulb
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"
6. bulb
a rounded dilation or expansion in a canal or vessel or organ
Source: WordNet® (An amazing lexical database of English)
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