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Meaning & Definition of Bulb in English

English

Bulb

/bəlb/

noun

1. A modified bud consisting of a thickened globular underground stem serving as a reproductive structure

    synonym:
  • bulb

2. Electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity

    synonym:
  • light bulb
  • ,
  • lightbulb
  • ,
  • bulb
  • ,
  • incandescent lamp
  • ,
  • electric light
  • ,
  • electric-light bulb

3. A rounded part of a cylindrical instrument (usually at one end)

  • "The bulb of a syringe"
    synonym:
  • bulb

4. Anything with a round shape resembling a teardrop

    synonym:
  • bulb

5. 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"
    synonym:
  • medulla oblongata
  • ,
  • medulla
  • ,
  • bulb

6. A rounded dilation or expansion in a canal or vessel or organ

    synonym:
  • bulb

Examples of using

Edison invented the light bulb.
Thomas Edison invented the light bulb.