WARNING: Antidepressant medications are used to treat a variety of conditions, including depression and other mental/mood disorders. These medications can help prevent suicidal thoughts /attempts and provide other important benefits.
Definition of parallel for Students. 1  1 : a line or surface that lies at or moves in the same direction as another but is always the same distance from it. 2  2 : one of the imaginary circles on the earth's surface running in the same direction as the equator and marking latitude.
Standard parallel standard parallel: A parallel of latitude used as a control line in the computation of a map projection, and which is therefore, true to scale. Some map projections have no defined standard parallel, others have one, while others have two. (iii) Standard parallel A standard parallel is a line of latitude that has true scale.