bulb

Noun
  1. A modified bud consisting of a thickened globular underground stem serving as a reproductive structure (synset 113154818)
    is a type of: stalk, stem - a slender or elongated structure that supports a plant or fungus or a plant part or plant organ
    subtypes:
    • onion - the bulb of an onion plant
    • shallot - aggregate bulb of the multiplier onion
    • squill - bulb of the sea squill, which is sliced, dried, and used as an expectorant
    • bulbil, bulblet - small bulb or bulb-shaped growth arising from the leaf axil or in the place of flowers
  2. Electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity (synset 103671250)
    is a type of: electric lamp - a lamp powered by electricity
    has: filament - a thin wire (usually tungsten) that is heated white hot by the passage of an electric current
    same as: electric light, electric-light bulb, incandescent lamp, light bulb, lightbulb
  3. A rounded part of a cylindrical instrument (usually at one end) (synset 102918826)
    "the bulb of a syringe"
    is a type of: part, portion - something less than the whole of a human artifact
    is a part of:
    • mercury thermometer, mercury-in-glass thermometer - thermometer consisting of mercury contained in a bulb at the bottom of a graduated sealed glass capillary tube marked in degrees Celsius or Fahrenheit; mercury expands with a rise in temperature causing a thin thread of mercury to rise in the tube
    • syringe - a medical instrument used to inject or withdraw fluids
  4. Anything with a round shape resembling a teardrop (synset 113886656)
    is a type of: round shape - a shape that is curved and without sharp angles
  5. Lower or hindmost part of the brain;
    Continuous with spinal cord;
    (`bulb' is an old term for medulla oblongata) (synset 105502823)
    "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning"
    is a type of: neural structure - a structure that is part of the nervous system
    has: respiratory center - the center in the medulla oblongata and pons that integrates sensory information about the level of oxygen and carbon dioxide in the blood and determines the signals to be sent to the respiratory muscles
    is a part of: brain stem, brain-stem, brainstem - the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus
    same as: medulla, medulla oblongata
  6. A rounded dilation or expansion in a canal or vessel or organ (synset 105234409)
    is a type of: anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing and its construction and arrangement

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