longitudinal
adjective(lon-gi-tu-di-nal)
placed or running lengthwise
longitudinal
adjective(lon-gi-tu-di-nal)
of or relating to length or the lengthwise dimension
longitudinal
adjective(lon-gi-tu-di-nal)
involving the repeated observation or examination of a set of subjects over time with respect to one or more study variables
longitudinal
noun(lon-gi-tu-di-nal)
a wave (such as a sound wave) in which the particles of the medium vibrate in the direction of the line of advance of the wave