longitudinal

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

Definition of longitudinal

1 : placed or running lengthwise
  • The insect's back is black with yellow longitudinal stripes.
2 : of or relating to length or the lengthwise dimension
  • the longitudinal extent of the building
3 : involving the repeated observation or examination of a set of subjects over time with respect to one or more study variables
  • a longitudinal study of juvenile offenders over a period of five years

longitudinally

adverb

Examples of longitudinal in a Sentence

  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

Recent Examples of longitudinal from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'longitudinal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of longitudinal

15th century


LONGITUDINAL Defined for English Language Learners

longitudinal

adjective

Definition of longitudinal for English Language Learners

  • : 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


LONGITUDINAL Defined for Kids

longitudinal

adjective lon·gi·tu·di·nal \ ˌlän-jə-ˈtü-dᵊn-əl , -ˈtyü- \

Definition of longitudinal for Students

: placed or running lengthwise
  • longitudinal stripes

longitudinally

adverb

Medical Dictionary

longitudinal

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

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

longitudinally

play \\ adverb


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