hypotonic

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