Definitions of bulb:
  • noun:   a rounded part of a cylindrical instrument (usually at one end)
    Example: "The bulb of a syringe"
  • noun:   a rounded dilation or expansion in a canal or vessel or organ
  • noun:   a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
  • noun:   electric lamp consisting of a glass bulb containing a wire filament (usually tungsten) that emits light when heated
  • noun:   lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)

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