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Definition of Hypotonic
1. Adjective. (of living tissue) lacking normal tone or tension.
2. Adjective. (of a solution) having a lower osmotic pressure than a comparison solution.
Definition of Hypotonic
1. [adj]
Medical Definition of Hypotonic
1. 1. Having a lesser degree of tension. 2. Having a lesser osmotic pressure than a reference solution, which is ordinarily assumed to be blood plasma or interstitial fluid; more specifically, refers to a fluid in which cells would swell. Synonym: hypoisotonic. (05 Mar 2000)