longitudinaladj/ˌlɒŋ.ɡɪˈtjuː.dɪ.nəl/

• 1

  Running across a set direction of an object.

  • The motion about the longitudinal axis of an airplane is called roll.
  • ...forming the bottom of the hopper, in combination with the recriprocating longitudinal movement of the same, for the purpose of regulating the feed from the hopper, substantially as herein set forth.
• 2

  anatomymedicinesciencesRunning across a set direction of an object.

  • The units have transverse seats, two and three astride the passageway with single or double longitudinal seats alongside the two entrance vestibules in each car.
  • The third rotation is about the longitudinal axis of the thigh.
• 3

  Relating to the geographical longitude.

  • The longitudinal position of a ship refers to its angular distance east or west from the prime meridian.
• 4

  sciencesOf a study, sampling data over time rather than merely once.

  • longitudinal studies
  • Examining national longitudinal data, Mossakowski has found that people who were unemployed for long periods in their teens or early 20s are far more likely to develop a habit of heavy drinking (five or more drinks in one sitting) by the time they approach middle age.

longitudinalnoun/ˌlɒŋ.ɡɪˈtjuː.dɪ.nəl/

• 1

  Any longitudinal piece, as in shipbuilding etc.

• 2

  rail-transportrailwaystransportA railway sleeper lying parallel with the rail.