#bulb.part  a rounded part of a cylindrical instrument (usually at one end); "the bulb of a syringe"
  supertype:  #part.physical_object__portion  something less than the whole of a human artifact: "the rear part of the house"; "glue the two parts together"
  part of:  #mercury_thermometer__mercurythermometer__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
  part of:  #syringe  a medical instrument used to inject or withdraw fluids

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