| 1. | Physiology. (of tissue) having less than the normal tone. |
| 2. | Physical Chemistry. noting a solution of lower osmotic pressure than another solution with which it is compared (opposed to hypertonic ). Compare isotonic (def. 1). |
hypotonic hy·po·ton·ic (hī'pō-tŏn'ĭk)
adj.
Having less than normal tone or tension, as of muscles or arteries.
Having a lower osmotic pressure than a reference solution.