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WHD may refer to:

  • World Health Day, a public health education day designated by the World Health Ogranzation.
  • Wafer Handling Diffusion, a machine used to load/unload solar wafers into/from a diffusion furnace.
  • World Humanitarian Day, a day designated by the United Nation.
  • Wage and Hour Division, a division of the United States Department of Labor.
  • WHD-TV, a defunct experimental digital television station.
  • Werdnig–Hoffmann disease, an infantile-onset type of spinal muscular atrophy.