Dictionary

longitudinal

adjective lon·gi·tu·di·nal \ˌlän-jə-ˈtüd-nəl, -ˈtyüd-, -ˈt(y)ü-dən-əl, British also ˌläŋ-gə-\

: placed or going along the long side of something

: of or relating to longitude

: done by observing or examining a group of people or things over time to study how one or two particular things about them change

Full Definition of LONGITUDINAL

1
:  placed or running lengthwise
2
:  of or relating to length or the lengthwise dimension
3
:  involving the repeated observation or examination of a set of subjects over time with respect to one or more study variables
lon·gi·tu·di·nal·ly adverb

Examples of LONGITUDINAL

  1. The insect's body is black with yellow longitudinal stripes.
  2. calculating the longitudinal position of a ship
  3. a longitudinal study of career aspirations among girls from 5 to 17

First Known Use of LONGITUDINAL

15th century

longitudinal

adjective lon·gi·tu·di·nal \ˌlän-jə-ˈt(y)üd-ən-əl, -nəl, British also ˌläŋ-gə-ˈtyüd-\   (Medical Dictionary)

Medical Definition of LONGITUDINAL

1
:  of, relating to, or occurring in the lengthwise dimension <a longitudinal bone fracture>
2
:  extending along or relating to the anteroposterior axis of a body or part <a trypanosome which reproduces by longitudinal fission>
3
:  involving the repeated observation or examination of a set of subjects over time with respect to one or more study variables (as general health, the state of a disease, or mortality) <a longitudinal study of heart transplant recipients over a five-year period>
lon·gi·tu·di·nal·ly \-ē\ adverb

Browse

Next Word in the Dictionary: longitudinal bulkheadPrevious Word in the Dictionary: longitude signalAll Words Near: longitudinal
April 25, 2015
lissome Hear it
nimble or easily flexed
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears