longitudinal Definition
lon·gi·tu·di·nal (län′jə to̵̅o̅d′'n əl, -tyo̵̅o̅d′-; -lôn′-)
adjective
- of or in length
- running or placed lengthwise
- of longitude
- designating or of studies dealing with the development of an individual or group over a period of years
Etymology: ML longitudinalis
longitudinal Related Forms
lon′·gi·tu′·di·nally adverb
longitudinal Usage Examples
Preposition: with
questionnaire: Methodology The research design is longitudinal with questionnaires sent to a cohort of mental health diplomates at qualification and intervals thereafter.
Modifies a noun
- axis: Ailerons, usually placed far out on the wing, control rolling movement around the longitudinal axis.
- datasets: In addition a list of all other longitudinal datasets in the Data Catalog can be browsed.
- study: Longitudinal studies are designed to follow the same group of people over their lifetime.
- stripe: Heidegger's tires were Palmer's, leaving longitudinal stripes.
- fissure: It may still be enough to cause long term damage or weakness in the cortical areas above in the central longitudinal fissure.
- ligament: If the aneurysm has ruptured at this site posteriorly: The anterior longitudinal ligament of the lumbar vertebrae may be exposed.
Modifying Another Word
- not: If the lie of twin 2 is not longitudinal and a version is not easily accomplished.
- even: In a cross sectional analysis, riots would be rare and even longitudinal analysis would potentially take may years to complete.
- truly: With this first follow-up of the cohort, the study became truly longitudinal.

