What does unipolar mean?
Unipolar is an adjective meaning “having only one pole” or, more specifically, relating to a condition with one principal extreme. Its technical use in physics and electrical engineering describes systems, fields, or devices that possess a single pole rather than two opposing poles. Its best-known modern use is in psychiatry: “unipolar depression” refers to depression in which depressive episodes occur without the manic or hypomanic episodes characteristic of bipolar disorder. The word should therefore not be understood simply as another way of saying “sadness,” nor should it be confused with bipolar disorder. In medical writing, “unipolar” is normally used in established compound expressions such as “unipolar depression” and “unipolar disorder.” The term is more specialized than the everyday expression “one-sided,” but it is useful because it identifies a specific clinical pattern rather than merely describing a mood.
adjectiveHaving only one pole, or relating to a condition characterized by a single extreme. In psychiatry, it commonly refers to unipolar depression, in which depressive episodes occur without manic or hypomanic episodes.
- Having or constituting a single pole, especially in physics or electrical engineering.
- Relating to or designating a mood disorder characterized by depressive episodes without manic or hypomanic episodes.
"The device generates a unipolar magnetic field, while the patient’s diagnosis was unipolar depression."
"A unipolar magnet has one magnetic pole and produces a field that behaves differently from a dipole’s field."
"Her unipolar depression has required long-term treatment and careful monitoring for any signs of mania."
In electricity, unipolar means having one pole; in psychiatry, it means depression without a manic phase.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does unipolar come from?
Unipolar is formed in English from the combining form uni-, meaning “one,” and polar, meaning “of or relating to a pole.” The first element comes from Latin unus, “one,” while the second is based on Latin polaris, referring to a pole. The same components also appear in related English words such as bipolar, multipolar, and universal.
How unipolar is actually used
The term is technical in both scientific and medical contexts. In psychiatry, it is usually encountered in the expression “unipolar depression”; the older expression “unipolar disorder” is also common but can vary in usage.
Easily confused with unipolar
Unipolar depression involves depressive episodes without manic or hypomanic episodes, whereas bipolar disorder includes both depressive and manic or hypomanic episodes.