longitudinal
//ˌlɒn.dʒɪˈtjuː.dɪ.nəl//
Adjective
longitudinalCanonical form
1
Running lengthwise rather than across; relating to length or the lengthwise dimension.
The longitudinal stripes on the fabric run from top to bottom.
2
(Of research or data) involving the observation of subjects or phenomena over an extended period of time.
The researchers conducted a longitudinal study to track changes in participants' health over twenty years.
3
Relating to longitude; measured from east to west on the Earth's surface.
The longitudinal distance between Tokyo and London is approximately 140 degrees.