longitudinal
lon-gi-tu-di-nal
adjective
Extending in the direction of length, or involving a long period of time.
"They conducted a longitudinal study over many years."
Thesaurus
Synonyms: long, lengthwise, lengthways
lon-gi-tu-di-nal
Extending in the direction of length, or involving a long period of time.
"They conducted a longitudinal study over many years."
Synonyms: long, lengthwise, lengthways