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English Dictionary: bulb by the DICT Development Group
3 results for bulb
From WordNet (r) 3.0 (2006) [wn]:
  1. a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
  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(s): 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"
  4. anything with a round shape resembling a teardrop
  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(s): medulla oblongata, medulla, bulb
  6. a rounded dilation or expansion in a canal or vessel or organ
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Bulb \Bulb\ (b[ucr]lb), n. [L. bulbus, Gr. bolbo`s: cf. F.
      1. (Bot.) A spheroidal body growing from a plant either above
            or below the ground (usually below), which is strictly a
            bud, consisting of a cluster of partially developed
            leaves, and producing, as it grows, a stem above, and
            roots below, as in the onion, tulip, etc. It differs from
            a corm in not being solid.
      2. (Anat.) A name given to some parts that resemble in shape
            certain bulbous roots; as, the bulb of the aorta.
      {Bulb of the eye}, the eyeball.
      {Bulb of a hair}, the [bd]root,[b8] or part whence the hair
      {Bulb of the spinal cord}, the medulla oblongata, often
            called simply bulb.
      {Bulb of a tooth}, the vascular and nervous papilla contained
            in the cavity of the tooth.
      3. An expansion or protuberance on a stem or tube, as the
            bulb of a thermometer, which may be of any form, as
            spherical, cylindrical, curved, etc. --Tomlinson.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Bulb \Bulb\, v. i.
      To take the shape of a bulb; to swell.
No guarantee of accuracy or completeness!
©TU Chemnitz, 2006-2019
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