#fenestra  a small membrane-covered opening (especially one in the bone between the middle and inner ear)
  supertype:  orifice__opening__porta  an aperture or hole opening into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"
  part of:  ear
  subtype:  fenestra_ovalis__fenestra_vestibuli__oval_window__fenestra_of_the_vestibule  fenestra that has the base of the stapes attached to it
  subtype:  fenestra_rotunda__fenestra_cochleae__round_window__roundwindow__fenestra_of_the_cochlea  fenestra leading into the cochlea

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