#curvature.contour__curve  the property possessed by the curving of a line or surface
  supertype:  #contour__shape__form__configuration  any spatial attribute (especially as defined by outline); "he could barely make out their shapes through the smoke"
  subtype:  #curliness__curlines  of hair: a tendency to curl
  subtype:  #straightness.curvature  of hair: lack of a tendency to curl

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