Longitudinal is a

geometric term of location {{unreferenced, date=March 2014 Geometric terms of location describe directions or positions relative to the shape of an object. These terms are used in descriptions of engineering, physics, and other sciences, as well as ordinary day to day discou ...

which may refer to: * Longitude ** Line of longitude, also called a

meridian Meridian or a meridian line (from Latin ''meridies'' via Old French ''meridiane'', meaning “midday”) may refer to Science * Meridian (astronomy), imaginary circle in a plane perpendicular to the planes of the celestial equator and horizon * ...

Longitudinal engine In automotive engineering, a longitudinal engine is an internal combustion engine in which the crankshaft is oriented along the long axis of the vehicle, front to back. Use This type of motor is usually used for rear-wheel drive cars, except ...

, an internal combustion engine in which the crankshaft is oriented along the long axis of the vehicle, front to back * Longitudinal mode, a particular standing wave pattern of a resonant cavity formed by waves confined in the cavity * Longitudinal redundancy check, in telecommunication, a form of redundancy check that is applied independently to each of a parallel group of bit streams. * Longitudinal study, a research study that involves repeated observations of the same items over long periods of time — often many decades * Longitudinal voltage, in telecommunication, a voltage induced or appearing along the length of a transmission medium * Longitudinal wave, a wave with oscillations or vibrations along or parallel to their direction of travel * Longitudinal/longitudinally are also anatomical terms of location.

See also