#edge  a sharp side formed by the intersection of two surfaces of an object; "he rounded the edges of the box"
  supertype:  #object_side__side  an extended outer surface of an object; "he turned the box over to examine the bottom side"; "they painted all four sides of the house"
  subtype:  #bevel__cant__chamfer  two surfaces meeting at an angle different from 90 degrees
     subtype:  #splay  an outward bevel around a door or window that makes it seem larger
  subtype:  #bezel  a sloping edge on a cutting tool
  subtype:  #brim.edge__rim__lip  the top edge of a vessel
  subtype:  #kerb__curb  an edge between a sidewalk and a roadway consisting of a line of curbstones (usually forming part of a gutter)
  subtype:  #deckle_edge__deckle  rough edge left by a deckle on handmade paper or produced artificially on machine-made paper
  subtype:  #featheredge  a thin tapering edge
  subtype:  #knife_edge__knifeedge__cutting_edge__cuttingedge  the sharp cutting side of the blade of a knife
  subtype:  #leading_edge__leadingedge  forward edge of an airfoil
  subtype:  #milling  corrugated edge of a coin
  subtype:  #razor_edge__razoredge  an edge that is as sharp as the cutting side of a razor
  subtype:  #trailing_edge  the rear edge of an airfoil

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