Definition of Bulb

Noun: bulb bÃºlb

Electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
- light bulb, lightbulb, incandescent lamp, electric light, electric-light bulb, light globe [Austral, NZ]
A modified bud consisting of a thickened globular underground stem serving as a reproductive structure
A rounded part of a cylindrical instrument (usually at one end)
"the bulb of a syringe"
Anything with a round shape resembling a teardrop
A rounded dilation or expansion in a canal or vessel or organ
[archaic] Lower or hindmost part of the brain; continuous with spinal cord
"the bulb is the most vital part of the brain because it contains centres controlling breathing and heart functioning";
- medulla oblongata, medulla