Longman Dictionary of Contemporary English homepage

Topic: GEOGRAPHY

longitudinal

 adjective
     
lon‧gi‧tu‧di‧nal technical
1 relating to the development of something over a period of time
longitudinal study/survey/research etc
a longitudinal study of unemployed workers
2 going from top to bottom, not across:
longitudinal stripes
3SG measured according to longitude
—longitudinally adverb
Definition of longitudinal from the Longman Dictionary of Contemporary English within
the topic GEOGRAPHY
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