The term 'longitudinally' refers to something that is arranged or running in a line along its length. It is related to the term 'LENGTHWISE, ' which also means arranged or running in a line along its length. Both terms are used to describe something that is oriented in a particular direction. Longitudinally is the more specific term, as it implies that the orientation is along the length of something, while LENGTHWISE does not necessarily specify the orientation.