hypertonic

Definitions of hypertonic
  1. adjective
    (of living tissue) in a state of abnormally high tension
    hypertonic muscle tissue”
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    Antonyms:
    hypotonic
    (of living tissue) lacking normal tone or tension
  2. adjective
    (of a solution) having a higher osmotic pressure than a comparison solution
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    Antonyms:
    isosmotic, isotonic
    (used of solutions) having the same or equal osmotic pressure
    hypotonic
    (of a solution) having a lower osmotic pressure than a comparison solution
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