"unipolar" means having or involving only one pole. It can be used to describe a situation or condition where there is a single dominant or powerful force or element. Full definition
Sanhueza C, Ryan L, Foxcroft DR. Diet and the risk of unipolar depression in adults: systematic review of cohort studies. (whfoods.org)
Randomised controlled trials comparing agomelatine with placebo in the treatment of unipolar major depression were systematically reviewed. (cambridge.org)
Targeted prevention of unipolar depressive disorder in an at - risk sample of high school students (cambridge.org)