Meaning & use
longitudinal
Relating to length or to a study that follows the same subjects over a long period of time.
See it in a sentence
A longitudinal study tracked the students' reading skills over ten years.
Engineers checked the beam for longitudinal cracks along its full length.
A note on using this word
In research, 'longitudinal' contrasts with 'cross-sectional,' which studies different subjects at a single point in time.
Words with a similar meaning
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Words with an opposite meaning
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