1. (noun) bulb
a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
Synonyms: medulla, electric light, electric-light bulb, light bulb, medulla oblongata, incandescent lamp, lightbulb
2. (noun) 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
Synonyms: lightbulb, electric light, light bulb, medulla, electric-light bulb, medulla oblongata, bulb, incandescent lamp
3. (noun) bulb
a rounded part of a cylindrical instrument (usually at one end)
Synonyms: medulla, electric light, electric-light bulb, light bulb, medulla oblongata, incandescent lamp, lightbulb
4. (noun) bulb
anything with a round shape resembling a teardrop
Synonyms: medulla, electric light, electric-light bulb, light bulb, medulla oblongata, incandescent lamp, lightbulb
5. (noun) medulla oblongata, medulla, bulb
lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)
Synonyms: lightbulb, electric light, light bulb, medulla, incandescent lamp, myeline, electric-light bulb, medulla oblongata, bulb, myelin
6. (noun) bulb
a rounded dilation or expansion in a canal or vessel or organ
Synonyms: medulla, electric light, electric-light bulb, light bulb, medulla oblongata, incandescent lamp, lightbulb
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Synonyms for bulb 
