#slide  flat rectangular plate (a piece of glass) on which specimens can be mounted for microscopic study
  supertype:  #plate  a sheet of metal or wood or glass or plastic
  part:  #section.slice  a very thin slice (of tissue or mineral or other substance) for examination under a microscope; "sections from the left ventricle showed diseased tissue"

No statement uses or specializes #slide; click here to add one.