adj ·Rare ·Advanced level

Definitions

Adjective

1. 1
   Having a lower osmotic pressure than another.
2. 2
   Showing less than normal tension in the muscles or muscle tissue.

   "But always he went the full length, crying until he was completely exhausted, worn out, hypotonic."

Adjective

1. 1
   (of a solution) having a lower osmotic pressure than a comparison solution wordnet
2. 2
   (of living tissue) lacking normal tone or tension wordnet

Antonyms

All antonyms

hypertonicisotonic

Example

More examples

"Isotonic drinks are actually hypotonic."

Etymology

From hypo- + tonic.

Related phrases

osmotic pressure

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.