1) At one end only 2) Having a single pole 3) Like depression without mania 
At one end only. 
• (a.) Having but one pole or process; -- applied to those ganglionic nerve cells which have but one radiating process; -- opposed to multipolar. • (a.) Having, or acting by means of, one pole only.
1. <physics> Having, or acting by means of, one pole only. ... 2. <anatomy> Having but one pole or process; applied to those ganglionic nerve cells which have but one radiating process; opposed to multipolar. ... <physics> Unipolar induction, the simulation sometimes produced when one electrode of an induction apparatus is applied...
(u″nĭ-po´lәr) having but a single pole or process, as a nerve cell. pertaining to mood disorders in which only depressive episodes occur.
Type: Term Pronunciation: yū′ni-pō′lăr Definitions: 1. Having but one pole; denoting a nerve cell from which the branches project from one side only. 2. Situated at one extremity only of a cell.
Having only one polarity; primarily in reference to individuals who only manifest a manic or depressive phase in personality or thyroid bipolarity.
[adj] - having a single pole
A signal being measured is said to be unipolar when the voltage on its 'high' terminal is always the same polarity (normally positive) in relation to its 'low' terminal
adjective having a single pole
having or pertaining to a single magnetic or electric pole. · of or pertaining to a nerve cell in spinal and cranial ganglia in which the incoming and outgoing processes fuse outside the cell body.