A large, elongated dune lying parallel to the prevailing wind direction. Longitudinal dunes usually have symmetrical cross sections. They generally form in areas that are located behind an obstacle where sand is abundant and the wind is constant and strong. They are usually tens of meters high and up to 100 km (62 mi) long. Compare transverse dune.
- Longitudinal fissure of cerebrum
longitudinal fissure of cerebrum n. A deep cleft separating the two hemispheres of the cerebrum, but bridged by the corpus callosum and the hippocampal commissure.
- Longitudinal fracture
longitudinal fracture n. A fracture that follows the long axis of the bone.
noun, Naval Architecture. 1. . noun, Naval Architecture. 1. a system for framing steel vessels in which light, closely spaced, longitudinal frames are connected by heavy, widely spaced transverse frames with deep webs.
- Longitudinal lie
longitudinal lie n. An anatomical relationship in which the long axis of the fetus is longitudinal and roughly parallel to the long axis of the mother.