• Webster's Revised Unabridged Dictionary
    • n Diapophysis (Anat) The dorsal transverse, or tubercular, process of a vertebra. See Vertebra.
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Century Dictionary and Cyclopedia
    • n diapophysis The transverse process proper of a vertebra; the lateral process from each side of the neural arch, paired with its fellow of the opposite side of the same vertebra. It is one of the most constant and characteristic of the several vertebral apophyses. When there are more than one pair of transverse processes, the diapophysis is the dorsad or neurad one, as distinguished from a parapophysis or pleurapophysis. In cervical vertebras the diapophyses are commonly confluent with pleurapophyses, forming a compound transverse process, pierced by the vertebrarterial foramen, the posterior tubercular being the proper diapophysial portion of such formations. See cuts under atlas, cervical, and dorsal.
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Webster's Revised Unabridged Dictionary
NL. See Dia-, and Apophysis


In literature:

The diapophysial surface is larger and more spherical than the parapophysial one.
"A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America)" by John Wellman