longitudinal
adjective
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
Similar word(s): lengthways, lengthwise
3. over an extended time
- a longitudinal study of twins
Similar word(s): long
noun
1. Any longitudinal piece, as in shipbuilding etc.
2. A railway sleeper lying parallel with the rail.