n :  either of two processes on each side of a vertebra that articulate with adjoining vertebrae  a  :  one on each side of the neural arch that projects upward and articulates with an inferior articular process of the next more cranial vertebra - called also superior articular process   b  :  one on each side of the neural arch that projects downward and articulates with a superior articular process of the next more caudal vertebra - called also inferior articular process  .
 
 
 
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