#tracheid  long tubular cell peculiar to xylem
  supertype:  #vascular_tissue  tissue that conducts water and nutrients through the plant body in higher plants
  part of:  #xylem  the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels
     part of:  #woody_plant__woodyplant__ligneous_plant  a plant having hard lignified tissues or woody parts especially stems

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