Adjective
(of a solution) having a lower osmotic pressure than a comparison solution
(of living tissue) lacking normal tone or tension
Source: WordNetIt also prevents the cell from expanding and bursting ( cytolysis ) from osmotic pressure due to a hypotonic environment. Source: Internet
The latter have almost the same salt content as the extracellular fluids, whereas the former is hypotonic with respect to plasma. Source: Internet
When a biological cell is in a hypotonic environment, the cell interior accumulates water, water flows across the cell membrane into the cell, causing it to expand. Source: Internet