cyclothymia
Concise Oxford English Dictionary © 2008 Oxford University Press:
cyclothymia /ˌsʌɪklə(ʊ)ˈθʌɪmɪə/
▶noun Psychiatry, dated manic-depressive tendency.
– derivatives
cyclothymic adjective.
cyclothymic adjective.
'cyclothymia' also found in these Oxford entries:

