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Z-track (uncountable)

  1. (medicine, often attributive) A technique for intramuscular injection that uses a zigzag path.
    • 2004, Carol Taylor, Carol Lillis, Priscilla LeMone, Lippincott's Photo Atlas of Medication Administration, page 9:
      Beyea & Nicoll (1996) state that Z-track is the safest and most comfortable technique for giving any intramuscular injection.