euthymia
noun
eu·thy·mia
yü-ˈthī-mē-ə 
: a normal, tranquil mental state or mood
specifically
: a stable mental state or mood in those affected with bipolar disorder that is neither manic nor depressive
… there were no significant differences among groups in the rates of durable recovery, defined as 8 consecutive weeks of euthymia without a switch to mania or hypomania. —
Mark A. Frye, The New England Journal of Medicine
Mark A. Frye, The New England Journal of Medicine Cite this Entry
“Euthymia.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/euthymia. Accessed 4 Nov. 2025.
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