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pyr·a·mid

n 1  :  a polyhedron having for its base a polygon and for faces triangles with a common vertex  2  :  an anatomical structure resembling a pyramid: as  a  :  RENAL PYRAMID  b  :  either of two large bundles of motor fibers from the cerebral cortex that reach the medulla oblongata and are continuous with the corticospinal tracts of the spinal cord  c  :  a conical projection making up the central part of the inferior vermis of the cerebellum .
 
 
 
Similar sounding terms:  per·me·ate   premed  pri·mate  pro·mote 

 
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