#knob.handle  a round handle
  supertype:  #handle__grip__handgrip__hold  the appendage to an object that is designed to be held in order to use or move it
  subtype:  #doorknob__doorhandle  a knob used to release the catch when opening a door (often called `doorhandle' in Great Britain)
  subtype:  #stop.knob  (music) a knob on an organ that is pulled to change the sound quality from the organ pipes; "the organist pulled out all the stops"

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