pyramidal /py·ram·i·dal/ (pĭ-ram´ĭ-d'l)
pyramidal
pyramidal (p
ram´d
l),
1. shaped like a pyramid.
2. pertaining to the pyramidal tract.
pyramidal
[piram′idəl]
Etymology: Gk, pyramis
pertaining to the shape of a pyramid.
pyramidal (p
ram´dl),adj having the shape that is peculiar to a pyramid (i.e., a solid with polygonal base and triangular faces that meet at a common point).
pyramidal
shaped like a pyramid.
pyramidal disease
abnormal growth of the wall of the hoof in the horse in which the vertical midline of the front of the hoof bulges, causing lameness. Caused by fracture of the extensor process of the third phalanx or by low ringbone.
pyramidal nervous system
pyramidal-shaped nerve cells in the cerebral cortex and their efferent neurons to skeletal muscles.
pyramidal tracts
collections of motor nerve fibers arising in the brain and passing down through the spinal cord to motor cells in the ventral horns.
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