Noun midriff has 2 senses
  1. middle, midriff, midsection - the middle area of the human torso (usually in front); "young American women believe that a bare midriff is fashionable"
    --1 is a kind of area, region
    --1 is a part of torso, trunk, body
  2. diaphragm, midriff - (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
    --2 is a kind of muscular structure, musculature, muscle system; membrane, tissue layer
    --2 is a part of torso, trunk, body
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