#wedge  something usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them
  supertype:  inclined_plane  a simple machine for elevating objects; consists of plane surface that makes an acute angle with the horizontal
  subtype:  ax_head__axe_head__axehead  the cutting head of an ax
  subtype:  colter__coulter  a sharp steel wedge that precedes the plow and cuts vertically through the soil
  subtype:  moldboard__mouldboard  wedge formed by the curved part of a steel plow blade that turns the furrow
  subtype:  plowshare__ploughshare__share  a sharp steel wedge that cuts loose the top layer of soil
  subtype:  coign__quoin__coigne  expandable metal or wooden wedge used by printers to lock up a form within a chase
  subtype:  shim  a thin wedge of material (wood or metal or stone) for driving into crevices

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