<p><strong>Adjective</strong></p><ul><li>Of or relating to longitude or length: longitudinal measurement.</li><li>Extending in the direction of the length of a thing; running lengthwise: a thin, longitudinal stripe.</li><li>Zoology: Pertaining to or extending along the long axis of the body, or the direction from front to back, or head to tail.</li><li>Pertaining to a research design or survey in which the same subjects are observed repeatedly over a period of time.</li></ul><p><strong>Noun</strong></p><ul><li>A longitudinal framing member, as in the hull of a ship.</li></ul><p><strong>End of Response</strong></p>