A person who experiences cyclothymia, a mood disorder involving milder cycles of elevated and depressed moods that occur more frequently than in bipolar disorder.
From cyclo- (circle, cycle) + Greek 'thymos' (mood, spirit, mind), literally meaning 'one whose moods cycle' or 'someone with circular moods.'
Cyclothyme was once a common term in psychiatry, but modern doctors prefer 'cyclothymic person'—it's an example of how medical language evolves as we understand conditions better and develop less stigmatizing terms.
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