- Of or pertaining to longitude or length; as,
longitudinal distance. - Extending in length; in the direction of the length;
running lengthwise, as distinguished from transverse; as, the
longitudinal diameter of a body.
2 . Longitudinal
[ n.]
- A railway sleeper lying parallel with the rail.
Meaning of 'longitudinal' (Princeton's WordNet)
1 . longitudinal
[ a]
Meaning (1): - of or relating to lines of longitude
Longitudinal research Longitudinal research traces the behavior of one or more participants as the participant age. Longitudinal studies assess change in behavior