1 of or relating to lines of longitude; "longitudinal reckoning by the navigator"
2 running lengthwise; "a thin longitudinal strip"; "longitudinal measurements of the hull"
3 over an extended time; "a longitudinal study of twins"
relating to length, or to longitude
running in the direction of the long axis of a body
- Finnish: pitkittäinen
forward and/or backward, relative to some defined direction
- Finnish: pitkittäis-
The term, longitudinal means "along the major (or long) axis" as opposed to latitudinal which means "along the width", transverse, or across.
See also: longitude