BULB

Definition of BULB

  1. (noun)a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
  2. (noun)electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
  3. (noun)a rounded part of a cylindrical instrument (usually at one end)
  4. (noun)anything with a round shape resembling a teardrop
  5. (noun)lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)
  6. (noun)a rounded dilation or expansion in a canal or vessel or organ