- In a state of continuous unremitting action; denoting especially a prolonged muscular contraction.
- Invigorating; increasing physical or mental tone or strength.
- A remedy purported to restore enfeebled function and promote vigor and a sense of well-being; tonics are qualified, according to the organ or system on which they are presumed to act, as cardiac, digestive, hematic, vascular, nerve, uterine, general, etc.
[G. tonikos, fr. tonos, tone]
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Examples: glitazone, GI cocktail, etc.