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Definition of Longitudinal
1. Adjective. Of or relating to lines of longitude. "Longitudinal reckoning by the navigator"
2. Adjective. Running lengthwise. "Longitudinal measurements of the hull"
3. Adjective. Over an extended time. "A longitudinal study of twins"
Definition of Longitudinal
1. a. Of or pertaining to longitude or length; as, longitudinal distance.
2. n. A railway sleeper lying parallel with the rail.
Definition of Longitudinal
1. Adjective. Relating to length, or to longitude. ¹
2. Adjective. Running in the direction of the long axis of a body. ¹
3. Adjective. Forward and/or backward, relative to some defined direction. ¹
4. Adjective. (science and social science of a study) Sampling data over time rather than merely once. ¹
5. Noun. Any longtitudinal piece, as in shipbuilding etc. ¹
¹ Source: wiktionary.com
Definition of Longitudinal
1. [adj]
Medical Definition of Longitudinal
1. The word come from the Latin longitudo meaning length. Hence, longitudinal means along the length, running lengthwise, or (by extension) over the course of time. (12 Dec 1998)